I have a Chevrolet Impala V-6 that my son crossed a flooded street. The engine will turn over but will not start. We dried everything we could but still no luck. The check engine light is on but my friend put his code reader on it and there were no codes. Could it be the computer brain? If so, Where is it located? Thank-you for your help. Since I haven't a clue what to look for now. Respectfully, Johnny767
Won't start on 2004 Chevrolet Impala
by johnny767 in Derby, KS on August 17, 2009
ANSWER by Russ on August 20, 2009
Components in the engine compartment are pretty water tight. You will need to diagnose your crank-no-start condition. Spark and fuel are necessary, at the right time for your engine to start. It is fairly easy to check for spark so I would do that first, if spark is OK then make sure you are getting fuel to the cylinders. Sometimes the computer systems can be a bit complicated to diagnose so you may need some help from a qualified technician. The PCM is located in the air cleaner box but I would be surprised if that is your problem.
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