Question about 2004 Chevrolet TrailBlazer

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Trouble with my rpms

This only happens when I dont let my car warm up, when I start my car the RPMs are some where around 1500. If I try to drive it like that the frist time i come to a stop the RPMs usually drop below 500 and my car wants to cut off or it does stop, when I start it up again it runs just fine with no problems. What could this be.

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Here are some of the causes of surges, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

Posted on Apr 13, 2009

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Posted on Jan 02, 2017

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