Question about 2001 Grand Am SE
PO300 always, cylinder #2 misfire, R @ R plug ok, coil OK. cleaned plug. 7-08 SES light on again. #2 cylinder misfire again. cleaned fuel injectors, replaced the plugs, washed car for me at no charge.
Question about 1999 Grand Am GT
po300 code, replaced 1 crank sensor needing to know voltage on se Ok I have a 99 grand am GT 3.4 high output. Replaced the crank sensor on the back of block. The car is still running rough and not ...
code PO300 (multiple misfire) but cant figure out why. i have checked all hoses and electrical conectors and all are fine. i had to pull heads off and send in to shop and replaced all new gaskets, new
code po300, multiple missfire. replaced the idle air control valve, set it per instructions, and helped out but still the same. checked fuel pressure @ 45psi and when u give it gas drops down to about
...PO 300 and PO 420 po300 is a random misfire code(could be egr passages blocked under upper pleinum;plug wires;plugs or coils.PO420 is catalatic converter below threshold(converter has to be
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