IDLES RUFF AND STALLS WHEN THROTTLE IS PRESSED
Did you check for codes & google them, to see
if there are faults in a system?
Change Spark Plugs every 3 years?
Clean the MAF once or twice a year?
Change Oxygen Sensors at 100,000 miles
Look at Scan Tool Data & Road Test with that tool,
to look at data (that may help tell you if you have
an issue & almost what it is)
Check Fuel Pressure at motor & scan tool fuel pressure (if avail)
Look at TPS Sensor Data or back probe it ,to see if works correctly
Exhaust System Leaks?
Vacuum Leaks?
EGR problems?
Exhaust Converter worn out or partially blocked?
and on we go --lots more
SOURCE: rough idle
Has the check engine light been coming on ? Mine did, I check and it was showing The oxigen sensor too lean they try to sell me all o2 sensors but I check the fuel preassure and it was not ok only ocassionaly so if your fuel pump is not bringing the proper volume or correct preassure to the engine is gona show as a lean code letting u know somenthing is wrong but it was created by a defective f/pump do not start dumping money in sensors because 1 sensor can go bad but not 4 at the same time , ussually when this happens is a mechanical problem that can not be detected by the computer and is the only way to show u there is something wrong...If gona buy f/pump do not install other than AC delco brand becouse thats made for GM pruduct like your Escalade. If u dont have a check engine light on next simptoms will be ..If idle for long time it will act up and when you get it going it will miss and shake for a while untill u drive steady for couple of miles then it goes away,also if you are going down the road and u here the engine backfire (noise coming from the air filter) it means is running lean wich its created by a faulty f/pump.Good luck and let me know the outcome...
SOURCE: Cadillac Escalade
i had the same problem u need to take off and clean the throttle body and it clears right up
http://repairhelpcenter.blogspot.com/2012/01/engine-stumbles-coming-off-idle-when.html
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Erratic idle on car?
http://schematicsdiagram.blogspot.com/2011/12/erratic-idle-on-car.html
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Cold start problem and vehicle shudder around 2500 to
3500 rpms
http://repairhelpcenter.blogspot.com/2012/10/cold-start-problem-and-vehicle-shudder.html
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Low idle when cold out side?
http://repairhelpcenter.blogspot.com/2011/12/low-idle-when-cold-out-side.html
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GMC Sonoma Stalls and idles low
http://technoanswers.blogspot.com/2012/10/gmc-sonoma-stalls-and-idles-low.html
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GMC Idle Air Control
(IAC) Valve Replacing?
http://schematicsdiagram.blogspot.com/2011/12/gmc-idle-air-control-iac-valve.html
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1996 Camry
intermittent engine failure while idle?
http://repairhelpcenter.blogspot.com/2011/10/1996-camry-intermittent-engine-failure.html
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Engine quits at idle?
http://repairhelpcenter.blogspot.com/2011/10/engine-quits-at-idle.html
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Car overheats and Air
blows hot at idle?
http://howtobyme.blogspot.com/2011/11/car-overheats-and-air-blows-hot-at-idle.html
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High Idle Problem
http://repairhelpcenter.blogspot.com/2012/10/high-idle-problem.html
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While stop engine idles like cylinder
missing?
http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html
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Idle flair is noticed on car? Rough idle? car will not idle?
Erratic idle speed?
http://technoanswers.blogspot.in/2012/02/idle-flair-is-noticed-on-car-rough-idle.html
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High rpm in neutral? Inconsistant high RPM in neutral?
http://technoanswers.blogspot.in/2012/02/high-rpm-in-neutral-inconsistant-high.html
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Vehicle stumbling at idle and shows code 54?
http://schematicsdiagram.blogspot.in/2012/03/vehicle-stumbling-at-idle-and-shows.html
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Rough idle, staling and Erratic shifting?
http://technoanswers.blogspot.in/2012/03/rough-idlestaling-and-erratic-shifting.html
-----------While stop engine idles like cylinder
missing?
http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html
---------These details will help.Thanks.
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