SOURCE: What is the correct factory warm idle R.P.M. on a
It should be around 900RPM. But you are not supposed to adjust it on the throttle body. The computer does this by manipulating the idle air control valve.
SOURCE: Chevrolet tracker 2001 - started driving so that
Run a vacuum test. Start motor and try to rev a little. If the vacuum drops it could be a plugged cat or muffler, some type of exhaust restriction. Vacuum should pull steady at 15 to17 inches at idle. This is just one possibility.
The
following are the general instructions on the start of diagnosing any
electronically controlled engine or transmission problem.
The
Engine and Automatic Transmission (not applicable to manual
transmissions) in this vehicles drive train are fully electronically
controlled by a computer called the PCM and TCM (Power Train Control
Module, Transmission Control Module). When a problem like this or
other drive-ability related problems occurs the computer stores a
record of the problem (there are of course some exceptions to this,
like the fuel pump, engine coolant temperature sensor and MAF sensor
for instance) in the form of a fault code in its memory, to read
these fault codes you must have the systems memory scanned with a
special tool. Once the fault code(s) are read you then must perform
the appropriate diagnostic testing to find and resolve the problem(s)
DO NOT REPLACE ANY PARTS UNTIL A TRAINED TECHNICAIN HAS DIAGNOSED
THE PROBLEM TO AVOID SPENDING YOUR HARD EARNED MONEY ON PARTS THAT
MAY NOT CORRECT THE PROBLEM. Also always check fuel pressure for
correct spec for your make and engine type.
Also engine mechanical problems ca cause many drive-ability related
problem such as rough idle and other symptoms
SOURCE: rough running when engine is cold
It can be issue
with IAC( idle air control valve) causing the problem. There
are many other possibilities causing these idle issues. Engine idles rough. There
are few help links with solutions to troubleshoot such idle issues. I
suggest you refer the link below and follow
its troubleshooting details:------ Click
the link below:----- ----------- http://schematicsdiagram.blogspot.in/2012/03/stumbling-and-stalling-at-idle-after.html ------------ http://technoanswers.blogspot.in/2012/01/1999-ford-f-150-idles-rough-and-quits.html --------- http://repairhelpcenter.blogspot.com/2012/01/engine-stumbles-coming-off-idle-when.html ------------------ http://schematicsdiagram.blogspot.com/2011/12/erratic-idle-on-car.html ----------- Cold start problem and vehicle shudder around 2500 to
3500 rpms ---------- http://repairhelpcenter.blogspot.com/2011/12/low-idle-when-cold-out-side.html ----------- http://technoanswers.blogspot.com/2012/10/gmc-sonoma-stalls-and-idles-low.html -------- http://schematicsdiagram.blogspot.com/2011/12/gmc-idle-air-control-iac-valve.html ------------- http://repairhelpcenter.blogspot.com/2011/10/1996-camry-intermittent-engine-failure.html ------------ http://repairhelpcenter.blogspot.com/2011/10/engine-quits-at-idle.html ----------- http://howtobyme.blogspot.com/2011/11/car-overheats-and-air-blows-hot-at-idle.html --------- High
Idle Problem http://repairhelpcenter.blogspot.com/2012/10/high-idle-problem.html ------- http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html --------- http://technoanswers.blogspot.in/2012/02/idle-flair-is-noticed-on-car-rough-idle.html -------- http://technoanswers.blogspot.in/2012/02/high-rpm-in-neutral-inconsistant-high.html ------- http://schematicsdiagram.blogspot.in/2012/03/vehicle-stumbling-at-idle-and-shows.html ---------- http://technoanswers.blogspot.in/2012/03/rough-idlestaling-and-erratic-shifting.html ----------- http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html --------- These
details will help. Thanks.
Ford Expedition IAC valve replacing
http://technoanswers.blogspot.com/2012/12/ford-expedition-iac-valve-replacing.html
Bad miss at idle?
http://technoanswers.blogspot.com/2012/01/bad-miss-at-idle.html
Stumbling and stalling at
idle after engine rebuild?
1999 Ford F-150 Idles rough and quits when gas
pedal is pressed less?
Engine stumbles coming off idle when warm?
Erratic idle on car?
http://repairhelpcenter.blogspot.com/2012/10/cold-start-problem-and-vehicle-shudder.html
Low idle when cold out side?
GMC Sonoma Stalls and idles low
GMC Idle Air Control (IAC)
Valve Replacing?
1996 Camry intermittent
engine failure while idle?
Engine quits at idle?
Car overheats and Air blows
hot at idle?
While stop engine idles
like cylinder missing?
Idle flair is noticed on car? Rough idle? car
will not idle? Erratic idle speed?
High rpm in neutral? Inconsistant high RPM in
neutral?
Vehicle stumbling at idle
and shows code 54?
Rough idle, staling and Erratic shifting?
While stop engine idles
like cylinder missing?
SOURCE: How spark plug gap Chevy caprice 1989 V8 motor. Set idle up - too slow - stalling out.
Spark plug gap will usually not cause the engine to stall out. This vehicle should be fuel injected. The idle is controlled by the computer. How did you set it up? Have you scanned the computer for trouble codes to point you in the right direction? Check for vacuum leaks.
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