Gpz 900r revs slow to drop when throttle closed (doesn't need tickle) ,, kick, and away it goes . " Tweaking the throttle slack made no difference, so next I looked at the idle adjustment knob and lowered the idle speed back about 100rpm (probably to where it should have been). Using engines natural rpm drop to slow down the bike can help save your brakes. just my 2 cent do a compression test i just rebuilt the engine in my truck it had bad compression 90to100psi At idle - if I open the throttle to rev the bike, and close the throttle quickly - the engine revs for a long second or two before the revs fall. I From idle On sudden throttle opening (thats = normal quick acceleration) I have a flat spot and almost stalls, but if you open (twist) the throttle slowly (very slowly) it revs just fine I have a 1990 GPZ900, it idles and runs fine to about 4000rpm but will not rev under normal throttle application, i can get it to rev out if i wind the throttle on very slowly, its got new plugs too fast at closed throttle, pushing the rider deeper into turns when he really wants to be slowing down using engine compression. Every time I shut the throttle the revs dropped nicely - no issues at all. It continues to run at that RPM for a second or two, Therefore I am assuming that the ECU is feeding in a tiny amount of fuel to make the revs drop a bit slower after having applied throttle. Just make sure to stay in gear when you decelerate. I push the choke in and throttle it to warm up. I have checked the pilot screw for vacuum leak. My idle is set to around 1500rpm but sometimes it will suddenly increase revs to as much as 2500 or even 3000 on its own and I have to put it in gear and gently slip the clutch to drop the revs and pop it in to neutral and the revs stay back at the 1500 idle. If you add significant throttle then your revs shouldn't drop much and you get a smooth Revs drop when blipping throttle pedal. Does this help specifically with the roll-off to roll-on throttle snatch in slow moving traffic and when I took the carb apart, strayed the main jets and pilots, they weren't too bad. It also causes MTX (5 speed) Duratec's to jump up to 2,200 or 2,400 RPM upon a cold start. With the bike off ,open the throttle the whole way, then let go of it. The point of letting your clutch out relatively slowly, is that you use the clutch to match the revs of your engine to your gearbox. 0L with 83,000 miles, manual transmission. The iCarsoft V2. When the throttle is applied it seems like it revs sometimes but not how a normal motorcycle would. From the rev drop to coming back up to normal would take maybe 1. This shouldn't take too long, otherwise your clutch plate will heat up and wear. Tranona Well-known member. It slows down for fuel economy to allow the fuel catch up with the air. The bike revs it self pretty high. Should you drop or crash Re: High Idle when engine is warm first turn idle adjustment screw down, then could make mixture screw adjustments then need to synch carbs, if rev and idle stays high for awhile than slowly comes down one or two Hi all, I am noticing when going slow pulling out of junction engine pickup is slow to react regardless of how far down throttle is pushed, then suddenly off it goes quickly. Today's modern cars, trucks, and SUVs are all equipped with an electronic throttle control system that contains Hi thanks for your help '1938tubestock' I've just been out and had a look at mine but the throttle seems fine no sticking and returns to the stop smoothly. Throttle cables adjusted with proper slack. Audi A5 / S5 / RS5 Coupe & Cabrio (B8) - Revs dropping too slow? - Does anyone else ever find on their 6MT's that on a cold start from usually 1st to 2nd gear the revs seems to sometimes drop slower. it is not advisable to stop the Then when I'm starting to put some electrical load on the system the revs on the tachometer visually drops a 100-200RPM and the engine starts running rough, after a couple seconds the RPMs rise again, however the Based on what he is saying, the bike will idle around 1500 on a cold start and drop down to 500 once it warms up. I got it to run, got it to idle, but now when i rev it and let off the throttle, it takes awhile to come back down to idle. But it did also happen approaching a roundabout at speed (but slowing down) and just after starting the car it sometimes cuts out unless I give it some throttle. Anyway, after putting back, the rev is now dropping to idle very slowly. Definitely different from my '98. You only do it like that while you're engine braking/decelerating. 0L engine, this Ranger is a 98' 3. If I ease the throttle, it revs normally. Over time, dirt and grime that escapes through the air filter can accumulate in the throttle body, this results in improper throttle valve movement, which causes problems with the control of the air supply. Now the issue i'm running in to is if i press the gas pedal and hold a steady RPM then let off the throttle it will die every time. In this case you will struggle getting it to slow down. In cases where this valve is clogged or is failing, your vehicle I have the 2022 Mach 900R. coast to a stop, and at the side of the road check the plugs. Joined Now try running hard while keeping your mouth shut! 12 Nov 2018 #19 T. I may be being paranoid about my newly acquired MK3 1. After replacing the throttle slides, springs, and diaphragms, I manually tested the slide action. Valve adjustment complete, all tolerences are a tad to the loose side. Etc,etc 214 revs slow to drop? Jump to Latest 2. Put new plugs, oil and oil filter in it. I went back to the dealer this weekend, and Kawasaki GPz 900R Ninja (ZX900 Ninja) Year: 1984 - 85: Engine: Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder. Car hovers at 900rpm when idling and every 10-20 seconds the revs would slowly drop to about 500rpm before kicking back up to 1000 then back to 900. A quality sensor by itself usually runs $50 to $150, while labor costs range from $100 to Down 100-150 rpm just as the throttle closed, then returning to idle speed; so it did it even blipping the throttle at idle. Plugs seem a bit sooty. This richens the fuel mixture to reduce backfiring when coming to a stop. There should be a washer on either side of the synchro link which joins the throttle butterfly shafts of each carb pair on the left (2/4) and right (1/3) sides. If it binds or closes slowly, start with the easiest thing. To conclude, the car is very slow to accelerate and when it idles below 14. Then take your throttle assembly apart and pull the throttle open using the cable. A mechanical advance that comes on quickly will prop up the idle then slowly let it drop as advance falls off. Confirm that accelerator pedal is fully released, turn ignition switch ON and wait 3 seconds. a 86' gpz900r. and they removed the enrichment system as they apparently don't need them for uk driving but the revs are very slow to drop when I lift off the throttle. clutch is engaging). 0 it Revs slow to drop?? Jump to Latest 4. when I am expecting the bike to be using engine braking the revs are still high and driving the bike still). 2K views 5 replies 4 participants last post by Dr Dave Jun 23, 2002 It was mostly to stop back firing because of a sudden rich mixture from the butterfly snapping shut. Under those revs there is not enough volts generated to start charging. It’s a great sled; however, like many I have been a victim of the inconsistent RPMs. our 2012 did what sounds like the same thing. I drained the float bowls ( ht. Release throttle at high RPM's, cylinders attempt to draw air in. When the throttle body slams shut there is still some fuel and air making its way to the combustion chamber. but from 1990 on it was mostly about more power, more revs, more adjustment, less weight and sidestepping the emissions laws. 0 from UK Parts Direct will perform Electronic Throttle Body adaptations on supported vehicles. You might spot the RPM going up and down, and it’s certainly a situation of However, when the engine RPM drops below the normal range of 800 RPM (for most cars), it is more than likely that you are dealing with an IAC valve problem. Improper re-mating of carb synchro links. If you're accelerating, you don't blip. Its really bad, like a A couple cylinders act as though they aren't able to get enough gas at a certain level. So i take it for a ride and its got a ton of torque at low rpms. It runs really strong and smooth though. Instead of just closing the throttle My wife's 1996 DR200SE takes several seconds to return to idle after closing the throttle. What you can do is run the bike at speed at those rpms, and while running, shut the bike off and pull the clutch. Etc,etc Help ! I have an 05 260 Evo8 with HKS Silent HiPower, Ecutek remap that has done 213kw at the hubs on a dynapack dyno so the car runs well ! But on the road I often get a problem when closing the throttle that the revs dont drop off as quickly as they should, sometimes they sit above 4k or 5k for a good few seconds (seems like an age when driving) and then Throttle Body Replacement Cost. But when I raise them quick and let them drop, there is a slight hesitate before reaching the bottom followed by a There will be no harm by removing the throttle bypass valve (mine's been gone for 6 years) but the car will drive differently. When i took it out for a ride, whenever i wanna slow down and let go of throttle, the rpm doesn't come down as fast as it usually does. If the throttle hangs, rather than blipping the throttle, open the hood, remove your air cleaner and see if you can manually force the front or rear throttle shafts closed. coast to a stop, and at the side of the road check the plugs Reving the car is not a problem but when the revs drop, they dont drop quickly like it should. Save Share Reply Quote Like. I made sure to thoroughly clean all brass parts and dropped the carb body in carb cleaner as well. From the image below, Pins A & B are the variable resistor that changes as throttle is applied, and Pins C & D are the idle switch. This give you a rich air fuel ratio. 0 for this problem without success. If gunge builds up on the butterfly valve, it can restrict the air required for a smooth idle when the butterfly is closed, so the engine ECU needs to open the Idle Air Valve more that it thinks it should have to and you get into a cycle of surging revs. Sometimes he will come off the practice track and it's at unless rev'd or warm. After warmup, the engine is slow to return to idle, staying around 2500 rpm for around 10-15 seconds before dropping to 1000. If I hold the brakes and slip the clutch, the RPM's drop to idle and will stay there (1000-1200). Engine revs slow to drop down between gear changes Engine revs slow to drop down between gear changes. Blip throttle and revs hang = rich/lean? (too old to reply) ChrisR 2005-04-30 05:09:46 results in the rpm dropping below the steady idle rpm and eventually returning to the idle rpm the bike is running a little rich. Any other potential The bike normally idles, very smoothly at about 1050, but now it refuses to do so and very slowly creeps up to about 2000. Hey guys, so I'm having an issue with my 2007 GS500F, ~27,000 mi. This kit directly replaces the original M5 or M6 fender hardware securing the DRL’s close to the fender for a sleek low-profile installation. Kawasaki's GPZ900R broke the mould Summer 1984. Moderators: hot66, impmad2000, Barry, Viv_Surby, Derek, Mike Usiskin. I would have expected it to start better , not worse. engine slow to drop revs on When I go to change gears, the engine doesn't seem to rev down very quickly, in fact, after letting go of the throttle completely, i'd even say the engine continues to increase its revs for a couple of milliseconds. Hi. F. Moderator: martauto. Need technical Q/A then you're in the right place. Fully release the accelerator pedal. when cold, she turns right over with choke on, and goes straight to 4K. I think I read some time ago that the slow drop off in revs was due to emissions management - emissions are higher when the air intake If the throttle plate is closed, injections go back to idle settings, but there is not enough air in the plenum to get to the 14. Car feels fine normally just pulling away from slow. Luckily for us the dealer under warranty reflashed the cpu, saying there had been an update. s is electronic. Mine does the same thing. My first thought was an air leak so I need to get into hunting. Although it I purposely set the idle on the high side to cope with closing the electric windows etc when at idle, although since advancing the timing a little when the revs drop, this seems to have been cured - I can certainly decrease to around 850 RPM now but I dont believe this will affect the issue I posted above. By EvenAce February 5, 2012 in Corolla / Corolla Sportivo Club Share Even when you step off the throttle and push the clutch in to select the next gear they still seem to take a while to drop. a. To ensure a smooth gearchange I have to wait what seems like forever (it's not, of course) for the So . I also confirmed, with my own eyes on BUDDS that the throttle is opening 100%. For a small petrol engine this would be around 800rpm, a diesel around 500rpm. If you narrow your LF-250B, GPz 305, GPZ 500S, Burgman 400 // RIDING: F650GS (800 twin), Royal Enfield Bullet Electra 500 AVL, Ninja 250R because racebike But then it had the issue of sputtering under throttle but . This is very weird, it seems that M54B22 (6 cyl) has better response than V8. I got the carbs back on the bike today. If the oil pressure significantly drops with little change in rpm and simply removing the load restores the pressure, with little or no change in rpm I always look at the main I think I read some time ago that the slow drop off in revs was due to emissions management - emissions are higher when the air intake is shut off quickly. I've tried the TPS reset again - no luck. Street riders This usually shows up as the Sniper temperature increases. Hook up a multi meter to the signal wire and The TPS monitors the position of the throttle valve, which regulates how much air is supplied to the engine. i have a k&n which im goni take off today to see if this helps maybe I am presuming this is a gasoline engine. The RPMs will drop quicker any time the clutch is pressed. If you turn the rear shaft and the idle drops you will need to reposition the throttle blades. Therefore When you add some juice on the gas pedal (car is parked, not in drive mode) - revs go well, but after releasing gas pedal RPMs drop slowly. Ditto for the left carb pair to right Engine RPMs don't drop immediately when throttle closed? Discussion in 'Thumpers' started by gkostolny, Mar 13, 2007. The correct method of setting the idle mixture screws is to First thing to check is whether the throttle is actually closing. High-performance riders blip the throttle very quickly when downshifting between gears as they set up for a corner. The usual causes are inlet side air leaks, worn By a whisker. even in neutral, sitting in the garage, a blip of the throttle and it revs up Those spacers take out the free play from a fully closed throttle, Since some notice the benefit at low speed more than the effect at high engine revs most are happy to accept the compromise Does this help specifically with the roll-off to roll-on throttle snatch in slow moving traffic and when cornering? If so, I’ll You can blip the throttle rapidly to reduce the time between gears, or you can be leisurely. Can anyone help? We recently bought a Forester 2. It is possible your idle revs are too low. 1980 I just bought an 04 KLX 110 and it had been sitting for about 2 years. It also looks like a micro-cut of current. My 92 1. A TPS replacement typically costs between $150 to $400, though prices can vary significantly based on your vehicle’s make and model. but not at tick over but at quite high revs . And the load increase is exactly what you’re seeing here. Basically I'm using the clutch to bring the revs down, which is obviously bad for the friction surface. The GPz900R lasted 13 years, On the side of some carbs is another diaphragm that temporarily closes the pilot or slow speed jet air passage when the throttle is closed. The average throttle body replacement cost is between $250 and $650, depending on the car model and labor costs. I think you are right about the temperature, I left it running for some time today and the idle revs did eventually drop to 1200 which still seems slightly high to me but is the book figure. Check the action and make sure the sring on the carb is working well. You can see the cables bow slightly in their respective positions. Test the sensor voltage. . Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. Yamaha’s FJ1100 was close, as was the RD500 but the GPZ was first. When I come to a stop, I have to feather the clutch to drop the RPMs. coming to a stop at a junction. The bikes starts easily, pulls away great, revs out and when moving all seems well. More indication of blocked elbow. As it was easy to reproduce on the dyno: it weirdly only seems to happen when the wheels are turning, no (or at least much less) issues when standing still. Either way, it is VERY annoying and I would like to find a way to make the revs drop a bit quicker on gearchanges. That would seem to imply lean but I richened the low speed circuit. But at the same time I'm surprised it idles nicely if it was an air leak. It actually works well with my manual as the revs don't drop enough to cause me to give it much throttle when downshifting. When the throttle body slowly closes it makes for a in the "$0 Thunder Throttle - Official DIY & Details" thread but sometimes ECU holds IAC open too long what cause slow dropping or hanging revs. Regarding the revs dropping slowly, I have studied what the car does in certain situations and it looks like it's trying to hold revs for an "average Blipping means you started with closed throttle and only open the throttle briefly before closing it again. If this is the case increase your idle revs. Help Please. If you have audio on at the same time you hear the blinker going, and each time the relay closes the electrical draw is (by sequence of events) causing the revs to drop. 5K views 8 replies 4 participants last post by tess daz May 9, 2009. What's odd - it doesn't do ANY of this junk with the throttle position sensor unplugged. The other part on the b/fly yes could be jamming with some crud in there. Main cable should have about 1/16 " of slack when throttle closed and return cable the same when throttle open. Check the diaphragm for holes and tears. I have search this forum and the 3. I have noticed that my 76 Honda CB550 revs down slowly. I can not find a vacuum leak anywhere. power requirement drops and revs rise. This is caused by the Idle Air Control solenoid programming, which keeps RPMs up with slow return drop upon closing the throttle. If restarted while warm it will idle normally and then when throttle is rolled off stay at the higher RPM. Usually it's the opposite problem the revs drop too slow because of the lean running condition. The only workaround I found was to completely reboot the machine with the lid closed and never open it up again during my gameplay. Check your cables for a crimp. Its not the Cable nor the Pedal. However, somewhere around 5500 rpms, it just stops accelerating. The throttle body costs between $200 and $500, while the labor Over time, dirt and grime that escapes through the air filter can accumulate in the throttle body, this results in improper throttle valve movement, which causes problems with the control of the air supply. I know that most engines have dampers on the throttle to prevent damage to the engine I have had a problem with the car where the RPM slowly drops when the car starts, i have tuned the carb to 14. Engine revs slow to drop. The engine idles nicely, but when I blip the throttle the revs rise, stay high and then slowly drop back to idle over say 5-10 seconds. 7. At the bottom of some carbs is an accelerator pump to pump extra fuel when the throttle is This problem is a slow throttle return to idle RPM between shifts. Since some notice the benefit at low speed more than the effect at high engine revs most are happy to accept the compromise and take the bigger win. I modulate the throttle purposely to Is it the cv slide slow to drop back down that keeps the revs from dropping like I am used to on every other gasoline powered engine in the world. Capacity: 908 cc / 55. Apart from that, at Read our in-depth, expert 2017 Kawasaki Z900RS review on MCN - matches Z900 performance with Z1-inspired styling. Not to redline but it gets up there. With 0 throttle, you won't lug the engine. This happens especially if I keep holding in the clutch after down shifting. You can blip the throttle rapidly to reduce the time between gears, or you can be leisurely. gkostolny, Mar 13, 2007 #1. no change ,, Those spacers take out the free play from a fully closed throttle, nothing more. a. Most likely cause is too tight a bend in the cable where it routed down past the triple tree and tank, or a cable that The symptoms are that at low throttle openings (revs below 4,000) are that the engine pulls perfectly normally, but in higher gears (4th upwards) if you accelerate briskly the It revs great when sitting. Just recently I noticed that when I'm riding and are slowing down, when I downshift the revs will stay as high as they were in the previous gear, then about 3 seconds later slowly start to drop. Carbs have been gone through and cleaned and rejetted. For the car not to stall, i have to keep it reved and then put it into gear and move off, but the car seems to jolt about 3 to 4 times and then start moving steadily. Rock y For instance, my ford trucks and miata rev down slowly when the throttle is completely released, but our 3/4 ton chevy with 454 revs down quite a bit quicker. The bellow will refill, and you can repeat the process, filling the other bottle with smoke. A When sitting ticking over I can blip the throttle and revs drop back down ok. Family man Discussion starter. Alfa Romeo Production Models Forums. The days of having to constantly adjust the throttle cable due to a loose nut on the carburetor are long gone. Or maybe the throttle plate is closing "softly" to achieve the same thing. I got the bike started up, but still having trouble with I do have one weird foible, occasionally, (usually when the revs drop from 2. Top. So now when changing gear, the engine races in that short change up or down. by Gerrot Jacobson You cruise slowly into the parking lot with all your buds, ready for that idle to drop and chop, but it doesn’t. c Idle air control. It's hard to see, but it's a modified pipe handlebar. opened and closed throttle . i have the bike running now, have changed oil, replaced leads, checked coils + spark, cleaned out carbs and fuel lines, new spark plugs, cleaned air filter Help on revs not dropping. 6. 8. I disconnected the cable and started the engine and reved it up manually on the throttle shaft. Street riders While I am intimately familiar with the 4. It is very repeatable when warm. Any ideas? The engine revs are slow to build to when going into gear and applying throttle. A quality sensor by itself usually runs $50 to $150, while labor costs range from $100 to Lugging is running the engine at too low of an RPM and too high of a load (too much throttle). At full throttle or above ~6,500rpm it sounds as if it's leaning out, but I am able to I tend to run things a little rich to protect rings but maybe I should check the main jet and drop a size. The clutch is the link between your transmission and your engine. The jerkiness in manual gearshifting comes from mismatched revs. If the throttle plate is closed, injections go back to idle settings, but there is not enough air in the plenum to get to the 14. Used Wynn's Diesel particulate Cleaner also on 31 March 13. My C70 drops 100 revs or so when stopping too - hadn't worried about it too much, but it's recently Lugging is running the engine at too low of an RPM and too high of a load (too much throttle). When I rev the engine it seems slow to drop the revs even though the throttle has returned to the stops. simplified yes, but the rev-hang serves to burn the minute amounts of excess fuel upon throttle lift-off. cleaned the throttle body and the IAC valve; installed a new PCV valve; checked for vacuum leaks via a smoke test and the sparking carb cleaner method - I just tried a new MAP sensor. As long as it doesn't stall, once its idling again it seems to sit happily at a sensible RPM. Fuel is metered through the main by the jet needle at different throttle positions. 5. After the bike has warmed up it runs really, really well, except revs hang @ 3000 and slowly drop back to idle. When I sit at idle and push the throttle down hard the engine dies, almost stalling, before picking up again. The only way to have revs hanging after closing throttle is to programme it into ECU or in the old days have sticky slides in old AMAL carbs . Then, tighten the butterfly screws back down. Depends if it has a seperate idle air control valve that expects the throttle to be shut so it can do all the controlling or if the throttle plate assumes the role of idle air control valve when you're off the throttle For modern cars ~04 and up it Tech Tuesday: Hanging Idle – Gen 3 Fix – Throttle Cracker. 6 has a throttle hesitancy issue. You open the throttle to the right spot, and The trick is to add throttle once the revs sink (i. Rode 150 miles the next day with no problems. I'm logging the throttle follower airflow and it doesn't seem to Hi eveyone, can anyone help with a problem on my 04 tiger. If so, the symptoms sound very much like the throttle internals are dirty. The revs drop and once they hit the idle activation point rocket back up to 2k+ and then drop back to a steady idle. 1. If I accelerate hard into a corner, close the throttle and hit the brakes quickly -- the bike feels like it is still trying to accelerate (making for a very difficult late brake/turn). No matter how high you rev the engine or whatever mod you do, the computer will still control how slowly the engine will spool down. 9 posts • Page 1 of 1. 5V when fully open. The voltage should change smoothly as the throttle is opened and closed, typically from around 0. Progressive Fork Springs RT Gold Emulators, APE Valve Springs, 1166 Big Bore kit, RS34's, GPZ cams. Apply an ohmmeter across pins A & B, the resistance should decrease linearly as the The higher the compression the quicker revs drop. Once full, unscrew the smoke filled bottle and place your hand over top of it to trap the smoke in until you are ready to let it out over your engine. Easy Returns and Expert Tech Support. You look a fool, and your car Hi, The carburettors perform normally up until 3000 revs. To ensure a smooth gearchange I have to wait what seems like forever (it's not, of course) for the 6. I already have all power options disabled and this does not solves the issue. Choke circuit - Initiated by a valve or butterfly that increases the vacuum and opens the circuit up. Find the sweet spot where you can get the most closure out of the blades. I had the so called “fix” to the rpm problem update done this summer (primary spring, tps reset, and actually throttle cable adjustment done). "After cleaning or replacing the Electronic Throttle Body (ECTS), adaptation must be carried out (also the case if the negative terminal of the battery has been disconnected or when the Engine Control Unit has been replaced). There should be a charge indicator somewhere that is glowing, and goes out when you blip the throttle. Therefore Revving the engine and then slamming the throttle shut would result in an emissions spike out the exhaust, so the PCM is programmed to bring down the revs in a slower, controlled manner to allow the unburned fuel/HC to burn cleanly. Does anyone know of the underlying slammed the hood and shut the engine off and walked over to the reefer and got a can If the butterfly is closed too much, the revs will drop too far forcing the engine ECU to open the idle control valve (IAC). It's when I shut the throttle that there's a problem, the revs don't die immediately, but take 5-10 seconds to drop to tickover. If it SNAPS closed then your problem is not throttle related. What it also could be is runung rich and the eec is putting more air in there to reduce it a epa thing? Or maybe the throttle plate is closing "softly" to achieve the same thing. 0 XT (2004) Originally we test drove the impreza but the other half thought the PWK 28mm- revs not dropping when throttle closed by Pompeydave » Sat Nov 19, 2016 2:52 pm Hi all, I've got a Casa 198cc kitted lump with a BGM big bore box, and Kytronic advance/retard box and a PWK 28mm carb. It happens at all throttle ranges. It will then try to back off the It sputters like crazy up to 3k, then, even if I let the throttle go shut, it revs like crazy to 5k, then slowly backs down. so i think i must've tighten the cables too Some questions: If I buy a Ohlins rear shock for GPZ 900r, but then proceed to update the rear swingarm, do I risk the Ohlins no longer fitting the rear end? If I leave stock swingarm and add Ohlins rear suspension, but then The main jet is blocked, most likely, or the needle is riding high / the jet has dropped out, or the float isn't floating. The throttle, brake, and clutch cables, and hoses need to be replaced with longer ones. When in neutral and finally back to 900rpm I'll rev it and it drops to 1500rpm, hesitates there for a few seconds, then to 1100 and then finally to 850 Basically the revs drop too low - most noticeable coming to a stop in traffic. 2397 posts Usually gets soft and sucks itself closed around the intake manifold, where it gets hotter. Everything suggests an air leak somewhere, but Sometimes, as you are just chilling at the traffic light waiting to hit the throttle, you might notice an odd problem with the revs per minute gauge. When coming to a stop, the revs would drop to almost stall, then immediately come back up to normal idle. Once the bike is revved above 3000 revs, even with the throttle shut down at carburettor (where the idle screws are) the bike continues to pull fuel and the revs keep climbing. The i. Faulty throttle position sensor (TPS) The throttle position sensor or TPS is used to determine the opening angle of the throttle valve. I know I have seen an older posting about this topic but I can't seem to find it. It is a much more dangerous situation if your throttle is stuck Throttle blipping helps a rider to get faster by keeping the bike at such a state where it can give maximum power even after slowing down. I guess it helped emissions too. today i kinda played around with my throttle cable and the choke cables a little bit, and then when i fired up the bike, the idle was too low, so i had to adjust it. Fully depress the accelerator pedal. You're off warranty with an '06 w/70,000K As in, shift out of 2nd at 3,500rpm, going into third, and the revs will literally sit there at 3,500 for eternity, not drop at all. If you might know of a possible cause for this problem, please let me know. Use a multimeter to test the TPS voltage while moving the throttle. The car would die after a quick blip of the throttle, but I was able to get the throttle follower to slow the RPM drop so the vehicle does not stall. I haven't had the chance yet to pull the carbs off, but I did get down next to the carbs and work the throttle. It eventually started, but when it did and I got it to idle any time I gave it throttle ~5k it'd hang as it came through 3k and very slowly drop. (with it on the stand, put it into 4th , the speedo shows 40 mph . This effectly got my 60 FPS back When sitting ticking over I can blip the throttle and revs drop back down ok. It will then try to back off the air through the IAC, but since not enough air is getting passed the butterfly for idle, the revs will drop to Sometimes they drop slowly while I'm at a light, usually over more than 30 seconds it will drop down to ~2k. I'll still take this one. If you keep the throttle open when slowing down you will need more space and you don't get as much engine braking to help you. 5k+ rpm after a being under load i. Common causes of high RPM excursion at start-up are typically: large vacuum leak, throttle plate stuck open, cruise control stepper motor stuck in one position; faulty throttle position sensor, and/or faulty idle air control motor or solenoid. New Dyna ignition, including ignition and pick up coils, igniter is no longer used. Yup yup. From 2000rpm the Gee Pee takes full throttle with a hollow shudder, like it's clearing its throat before coughing out an awesome greenie. Cold starting and warm up. It runs really well and starts fine but the revs are slow to drop when changing gear. Your gas pedal is attached to the the throttle valve (either electronically or mechanically) — as you press the Local time 12:38 AM aest 14 November 2024 Membership 928,617 registered members 6,852 visited in past 24 hrs Big numbers 3,895,675 threads 74,758,119 posts With the oil hot at high way speed say 2500 steady rpm in high gear if I depress the accelerator fully on the average vehicle the rpm will slowly attempt to climb. The other half may be wondering about a throttle that won’t accelerate at all because it’s stuck in the closed position. tried the throttle stop screw . suspension, First thing to elliminate is any binding action on the throttle cables, they should move freely and snap back. So when revving, the carburettor butterflies close correctly (cable not sticking) but the revs do not drop immediately when throttle has shut off. Find Motorcycle Parts & Accessories for your 1984 Kawasaki GPz750 / R / GPz900R Ninja / ZX900R at Twisted Throttle. The throttle response when revving up is great, the throttle snaps back great, but the engine takes too long to rev back down to idle. Free Shipping. 5 mm) , fuel looked ok. fuel on, anti-sump open, close choke . Throttle blipping involves the downshifting of gears at high speed to slow down. The carbs have been cleaned and so I don't think that should be the problem. ZZ-R1100, then back to the GPZ again, you get a 900R with better engine. I bought a used DRZ400s and when it's warm if you close the throttle the engine revs don't drop right away like on my other bikes. Once squished, remove your finger from the hole and slowly release your grip. The slides are synced with each other and snap shut instantly so it is not a cable issue. 7 posts • Page 1 of 1. Thanks for all the helpful tips guys. 0 and i use the choke. 12 Nov 2018 #14 pvb Well-known member. Hello to you all, My otherwise-delightful car has an annoying characteristic: if I fancy or need a bit of strong acceleration, let the revs build, and then go for the next gear (5-speed manual), the engine speed dies only slowly with throttle released and clutch down. 8 ( 2006 ) but when I rev it, the revs go up as normal but come down quite slowly when cold and normal, years ago I would have suspected a sticking throttle cable or carbs, although I’m certainly no mechanic, is this normal or would something be causing the slow drop in revs ?, its not really a problem but just The Interceptor does idle at higher revs when it is cold, and then slowly turns down to 1200RPM. If you want to slow down to a stop you should: Roll off throttle (slowly and all the way). It seems that the higher the idle is set, the longer it takes to come back down to idle when the throttle is closed - i. I have problem whit revs drop at my 2002 325i M54B25 Here is video of my problem: When the car is cold, that drop in rpm often causes the car to shut down. b. For classic Porsche 911 content. ie. It just seams to be slow in coming down with the RPMs, like the The guy doing the mapping changed the speed and percentage of the throttle body closing, but the issue is still there. In normal operation, the throttle door is closed, creating a vacuum. 1984 was the year when bikes got faster. 4 cu-in: Bore x Stroke: 72. Joined 10 Nov 2007 Messages 42,554 If your revs are too low for the speed of the bike (normally when pulling away from a stop) that's when you stall. When I turn on my bike and just sit on it, no throttle application, no changing in choke, nothing. My 1981 Mazda 323 had an 'idle up' vacuum actuator that was electronically driven from the coil points to stop the throttle closing all the way for about a second after the throttle was cut. This will make the motorcycle look more naked. 20 seconds until Hi eveyone, can anyone help with a problem on my 04 tiger. I can still drop the revs by engaging the clutch. I have an intermitent problem whereby when I shut the throttle the engine revs are sometimes very slow to return to idle, this is causing me to occasionally run to fast into corners. Then I go out for a run and revs are definitely not dropping down during gear changes? What you can do is run the bike at speed at those rpms, and while running, shut the bike off and pull the clutch. Engine is standard but it has never felt as responsive as my old 91 1. 5 seconds. set @ 13. p. Once I'm riding for a couple minutes, and the bike is really warmed up, the engine revs high and won't drop down between shifts. , if the idle is set so low that the bike is barely running, the revs will fall much faster once the throttle is closed. Every now and again it wouldn't recover from the drop and would stall instead, several lights on the dashboard lit up telling me nothing. 5V when it’s closed to 4. In normal operation, the throttle door is closed just my 2 cent do a compression test i just rebuilt the engine in my truck it had bad compression 90to100psi and the revs dropped really slow now that Hello to you all, My otherwise-delightful car has an annoying characteristic: if I fancy or need a bit of strong acceleration, let the revs build, and then go for the next gear (5-speed manual), the engine speed dies only slowly with throttle released and clutch down. If i rev the car either when stationary or while moving but with the clutch down the revs seem to drop quicker but when i take my foot off the throttle for gearchange the revs seem to stick for a while so unless i wait for the revs to drop causes harsh The t. Cleaned EGR and boost sensor 31 March 14 and was all ok. Dodge Freak With the bike off ,open the throttle the whole way, then let go of it. Jeff With one hand close the throttle shaft and with the other wiggle the butterfly blades around. In order to help fight pollution, BMW engine computers release the throttle at a determined rate to allow the fuel/air mixture to stay at a stabilized ratio. I'm having some trouble to get the 250 Road to respond correctly to a closed throttle. Throttle is smooth, opening and closing with no binding. I love how Ferraris all seem to be very quick both up and down the rev range (I don't know how much of that has to do with small bores and short stroke). From that point, keep the clutch almost constant, or at least let it come up slowly. all works fine but does not slow to tickover . The only bikes that could get close to the revs drop righ down maybe as low as 450rpm the battery light flashes on and then off as the revs go back up and bounce around between 700-1100rpm until they settle after say 3-4 seconds, id say 50% of the time when the revs drop low it cuts out which is doing my head in. They work just fine when I raise and drop them slowly. BackinBlack E30 Zone Newbie Posts: 94 Joined: Wed Apr 09, 2014 10:00 pm This is as the result of a weak mixture as the throttle is opened from fully closed. pretty nice they gave you a new steering gearbox. Repeat the following procedure quickly five times within 5 seconds. It also had a clean sweep in the 1984 TT production class. If you request a diagnostic by a certified YourMechanic technician, he or she would first check to see if any Diagnostic Trouble Recently I bought myself a Lenovo Y50 and I started noticing the FPS drop as soon as I closed the lid. If the butterfly is closed too much, the revs will drop too far forcing the engine ECU to open the idle control valve (IAC). With the wax assembly, cold start idle should be over 2000 rpms (as long as the unit is still functioning) and then drop down to revs slow to drop when changing gears i have to wait for revs to drop to let clutch when changing gears and it is - Hyundai 2004 Elantra question. iroc34. 5 x 55 mm: Cooling System: Liquid cooled: Compression Main Jet - Wide open. 4 posts · Joined 2009 Add to quote; Only show this user #1 · May 5, 2009. 7:1 desired for complete combustion at revs. GT (1963-1977) Reving the car is not a problem but when the revs drop, Release throttle at high RPM's, cylinders attempt to draw air in. e. Messy to start.
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