Question about 2003 Chevrolet Monte Carlo
My 03 monte carlo is very sluggish. The engine pings badly under excelleration and will not rev over 4,000 rpm. I have 3 engine codes: P0404, P0502 and P0440. What do I do?
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Posted on Jan 02, 2017
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I'd suspect a sticking injector--car should have set the check engine light. Read the code(s) to progress further. If the coil pack were a problem, it would not be likely to fix itself. If the codes indicate an injector problem, try an injector cleaner in the fuel--worst case, replace the bad injector. The codes should indicate which cylinder to change the injector.
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