Question about 2006 Chevrolet Impala

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Engine rpms goes up and down at 1100 rpms - 2006 Chevrolet Impala

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Without my head under the bonnet its a difficult thing to advise as the newer the motor the more dependent it is on electronics but i would suggest checking all the vacumn pipes around the inlet manifold area then if they appear ok try cleaning the mass air flow sensor and then if still phasing try the stepper motor ,problem is a lot of these newer vehicles use advanced electronics now although most mechanics can tell you what the electronics are controlling they cannot know or be able to reset anything without the dealer ability to connect to the vehicle to the internet for diagnostics which is the latest way of creating more work for the dealers ,This problem could be associated with the power steering electronics whereby the road speed of the vehicle and engine RPM are all computed as one entity and even a spike in the voltage like a low battery can damage the chips in the computers and so its a dealer job to diagnose and reset the NEW units as they will not play around with the old ones ,no money in that is their now think logically .

Posted on Feb 25, 2012

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Posted on Jan 02, 2017

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My ford escape 2008 hybrid suddenly runs at higher rpms and idles at 1500 rpms. yesterday it worked fine and idled at 1100 rpms


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Car will start and idle well, idles fine in the different gears. Then when you go to accelerate, about 1100 RPMs it starts surging up and down, but if you go up towards 13-1500 RPMs, it rides smooth. What...


Thanks for choosing FixYa and welcome to the site. I would say it is either the idle control sensor or the map sensor. Usually, with the map sensor, you experience the car stalling out. If this is not happening, I would say change the idle control sensor. If you have a check engine light on, take it to Autozone and have it scanned to make sure.

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After vehicle has warmed, the oil light comes on under 1100 rpms . rev the engine the light goes off


You can't trust the light sensor, so you need to get a mechanical gauge. A cheap capillary tube one is only $10.
You should also change oil.
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You could also have a problem with fuel or ignition, causing oil dillution.
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My 1996 GMC jimmy wants to stall when I come to a stop. The RPM gage goes up & down then drops below 1000 RPMS and stalls.


I would go down to your local auto parts store and do an alternator and battery test. It sounds like at low rpms you are loosing volts. When you apply the brakes you would be supprised how much power from the engine it takes. You could also be loosing oil pressure. Check your oil level. When your engine drops low rpm, the oil pressure drops and shuts down the engine.

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