Question about 2003 Chevrolet TrailBlazer
First check your vacuum lines. If it isn't a bad vacuum line it is most likely the O2 sensor on one of your manifolds.
Posted on Apr 21, 2009
Here is the common problem and fix.
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 21, 2009
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Posted on Jan 02, 2017
I would start by checking the oil level. See where it is at. Did you have the oil changed by a reputable oil change place or dealership? Let me know if the oil is at the correct level on the dipstick and we can go from there.
Posted on Jul 31, 2009
possible feul filter clogged or could have low feul pressure from the pump should have at least no less than 35lbs of pressure continuous to injectors when accelerating
Posted on Jul 30, 2008
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