2003 pontiac grand am. When sitting in driveway ideling, the engine revs really high then really low. Can anyone suggest why?
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: Grand Am 2003 "service engine soon" light
The service light means something is wrong with the car and it needs attention now. Get the codes checked and that will tell you what is wrong with it.
SOURCE: high rev problem
this problem I find in alot of 3.4 ltre grand-ams and that is the wiring go to the intake air temp sensor is broken at the connector. the wire will look good but in the insulation it will be broken. just give each wire a tug, if the wire pulls out then that is the broken one.
SOURCE: Pontiac 2003 grand am low coolant light comes on
check if the engine is over heat,it it over heating ,definitely the coolant will dry,so check is,hope that clear your mind and help you
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