Funny Idle, Falling on Face
06-28-2008, 10:43 PM
#1
TECH Regular
Thread Starter
Funny Idle, Falling on Face so ive got a few problems that im still scratching my ***** at.
problem one
car wont idle correctly. car will start fine, goes to about 1500rpms and then idles down to 1000rpms, drops down to 900rpms for a about 5 seconds then the car will start revving it self up to 1500/2000rpms. if its a cold start, cars been sitting over night it will sit at 2000rpms, if its been driven and warm it will be about 1500-1700rpms.
when the car is being driven, doing 50mph and push the clutch in it will drop down to 1500rpms. pulling up to a stop light andstoping the car will idle down from 1500rpms to 1000-900rpms for about 5 seconds then will go back up to 1500rpms.
i checked for a vaccume leak and dident find smuk, used a rubber plate to block off the TB and it died instanttly. ive idled the car and unpluged the IAC,TPS and MAF. one at the time and then all at once. idle was not effected at all. ive removed the throtle cables to make sure they are not binding and holding it open
tps at idle is at .6v, IAC pins A-B where at 51.Xohms and pins C-D where at 54.Xohms.
no codes are being throwen, inless you open up a large source of vacume leak(remove vac line from break booster) the idle dosent very much from the numbers list above.
the other proble is, as soon as the car hits 5 grand(this was in 4th gear.3.73's with about 5psi) it falls on its face, like the clutch was pushed it, havent started looking into this very far yet becuse today was the first time it has happend. , in the lower gears 1,2 it has no problem hitting the revlimiter, havent tryed third.
this dident feel like a revlimiter becuse it dident do the bounce/jolt feel the car gets when you hit it. it just felt flat.
any and all advice or things to check would be awasome and really appreciated
1994 Camaro Z28
M6
100,XXX Miles
racetronixs fuel pump and hot wire kit
44lbs flow matched injectors from racetronixs
CSR Electric water pump
3.73 gears
turbo kit with gts76mm running 5-6psi
MSD Opti/Coil/8mm wires
TR65ix plugs being swaped to tr6ix
Computer Tuned By PCM For Less
side note, full tank of prem.gas lasted 100miles
problem one
car wont idle correctly. car will start fine, goes to about 1500rpms and then idles down to 1000rpms, drops down to 900rpms for a about 5 seconds then the car will start revving it self up to 1500/2000rpms. if its a cold start, cars been sitting over night it will sit at 2000rpms, if its been driven and warm it will be about 1500-1700rpms.
when the car is being driven, doing 50mph and push the clutch in it will drop down to 1500rpms. pulling up to a stop light andstoping the car will idle down from 1500rpms to 1000-900rpms for about 5 seconds then will go back up to 1500rpms.
i checked for a vaccume leak and dident find smuk, used a rubber plate to block off the TB and it died instanttly. ive idled the car and unpluged the IAC,TPS and MAF. one at the time and then all at once. idle was not effected at all. ive removed the throtle cables to make sure they are not binding and holding it open
tps at idle is at .6v, IAC pins A-B where at 51.Xohms and pins C-D where at 54.Xohms.
no codes are being throwen, inless you open up a large source of vacume leak(remove vac line from break booster) the idle dosent very much from the numbers list above.
the other proble is, as soon as the car hits 5 grand(this was in 4th gear.3.73's with about 5psi) it falls on its face, like the clutch was pushed it, havent started looking into this very far yet becuse today was the first time it has happend. , in the lower gears 1,2 it has no problem hitting the revlimiter, havent tryed third.
this dident feel like a revlimiter becuse it dident do the bounce/jolt feel the car gets when you hit it. it just felt flat.
any and all advice or things to check would be awasome and really appreciated
1994 Camaro Z28
M6
100,XXX Miles
racetronixs fuel pump and hot wire kit
44lbs flow matched injectors from racetronixs
CSR Electric water pump
3.73 gears
turbo kit with gts76mm running 5-6psi
MSD Opti/Coil/8mm wires
TR65ix plugs being swaped to tr6ix
Computer Tuned By PCM For Less
side note, full tank of prem.gas lasted 100miles
Last edited by 94m6Z28; 06-29-2008 at 03:45 PM. Reason: more info
07-03-2008, 02:08 PM
#6
put a vacuum gauge on it to see if there is a problem in the heads if you have nice steady vacuum there is no problem in the head but if its all over the place you may have an issue. check the optical sensor
