Question about 2003 Chevrolet Impala
When cold the engine starts and runs a few seconds then stalls
Posted by Anonymous on
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Posted on Jan 02, 2017
On the plus side, when you are finished, you will have a new control system! On the negative side, you just spent more money on parts than if you'd have just taken it to a dealer! I hope you tested those components and determined they have failed. Any codes?
Seems like the only thing you missed is the coil and the temp sending unit (just for laughs, unplug it and see if it stalls out at the same time), or possibly a security system malfunction. Get a decent volt/ohmeter and a vehicle specific manual such as chiltons or haynes. Do some testing, hot and cold and compare your results.You need to determine what is shutting down (fuel, spark or both) Once you develop a "picture" regarding what is happening, you will be more able to find a solution. I can't give you a "fix" on this one only because to properly identify the problem, I'd need to do the same testing I suggested.
Posted on Sep 03, 2009
Sounds like your throttle body and throttle plate are full of carbon.You also have a idle air control motor with a pintle on the end that gets carbon on them.Go to your local parts store and get a can of throttle body cleaner and a old tooth brush and clean throttle body and plate and if you can remove the IAC and clean the pintle and bore. that should take care of your stalling.
Posted on Nov 05, 2009
If turning the key just to on position,(not start) once before trying to start doesn't help in that situation, I'd suspect a fuel injector(s) may be leaking down when engine shut off, and basically causing an engine flooded condition. You may get lucky with a good injector flushing done by professionals, but a fuel pressure test should confirm my suspicions.
Posted on Dec 21, 2009
I have replaced the radiator in my 2003 Chevrolet Impala LS. The car started running hot and shut down. Took it to a radiator shop and found a crack in the radiator. I have replaced 2 thermostats in the car already. I noticed water running from under my car today and it seems it was coming back out of the overflow. I am stumped as to what is going on with this car.
Posted on Jul 02, 2010
idle air speed motor might be gummed up. it controls your idle speed. remove and clean with spray carb cleaner to see if symptoms improve. Other problems could be vacuum leak or stuck EGR valve or PCV valve.
Posted on Sep 07, 2010
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