Tweet
Last fall I was going 75 down the interstate and my car just randomly started missing. Vacuum gauge was fluttering and car had not power. Obviously a miss. ECM threw a p300 engine misfire. Took a IR temp gun and found cyl #1 was dead. Since then ive changed spark plug on #1, spark plug wire, swapped #1 and #3 injectors, changed #1&4 coil, changed ignition module, checked for 12V at the injector, and ohm tested the ground wire to the ECM. Everything checked out. I have even hooked a timing light up to the #1 plug wire to verify its getting spark and it does. Spark plug smells of fuel. Engine doesnt sound any different when #1 injector is plugged in or not or if the spark plug wire is plugged in or not. Checked compression and took valve cover off to make sure the valves are opening. No other helpful ECM codes. Engine was completely rebuilt 10 months ago and got new bosch o2's.
HPtuners says bank #1 is dead rich, at idle the O2's are like 100 where on bank 2 they are 400-900 and fluctuate. Ive got an HP log if it would help.
Im pretty good at fixing stuff but NOTHING ive done will get rid of the dead #1 cylinder. Only thing that has stumped me in the past 5 years.
The only thing left is to swap out the ECM. Id rather not because then I have to re-license the ECM and loose $100 to tune it again. Is there anything else that im overlooking? Its been broke since November and its been to cold to fix.
There are no RWD ECM's close to me on car-part so I looked and they claim RWD and FWD ECM's are the same. Are they? It seems to me like the pinouts might be different for trans and o2 sensor stuff. I know 97 ECMs are different than 98+.
HPtuners says bank #1 is dead rich, at idle the O2's are like 100 where on bank 2 they are 400-900 and fluctuate. Ive got an HP log if it would help.
Im pretty good at fixing stuff but NOTHING ive done will get rid of the dead #1 cylinder. Only thing that has stumped me in the past 5 years.
The only thing left is to swap out the ECM. Id rather not because then I have to re-license the ECM and loose $100 to tune it again. Is there anything else that im overlooking? Its been broke since November and its been to cold to fix.
There are no RWD ECM's close to me on car-part so I looked and they claim RWD and FWD ECM's are the same. Are they? It seems to me like the pinouts might be different for trans and o2 sensor stuff. I know 97 ECMs are different than 98+.
Comment