i just had the spark plugs replaced with porsche ones 99917022190.
when i turned on the engine it appeared worse that with the old plugs and the CEL light came on immediately and solid.
i reset the durametric error codes and ran a new check. Errors on cylinders 3 and 7 no longer appear but now i have a new error on cylinder 8
PO300 (like before)
random/multiple cylinder misfire
PO308 (new issue)
cylinder 8 misfire detected
short to ground or positive
i remember seeing the mechanic (who was very tired) trying to mount the left side cover on the right side and pushing exactly where cylinder 8 is located. he them realized that it was the wrong cover and used the correct one. i suspect that the original problem was solved by replacing the plugs, and that the mechanic created a new issue. looking at the engine i can see all cables going to coils perfectly perpendicular except for the cable of cylinder 8 that appear bent. could i be right?
i will go back to service and any advice will be highly appreciated.
thanks for your help
Check bother the Coil and Injector wiring/plugs for any shorting or lack of insulation.
I went to another mechanic today. Cyl 8 had the injector position moved, the connector of the wire to the coil with the safety lock broken, not plugged in the coil completely and therefore this caused the big irregularity cyl 8 (CEL
). Pushed it all the way in, the big irregularity went away and then I ran a Durametric
check. Still had misfires on cyl 8. Took out the new spark plug which had the electrodes almost touching each other. Fixed distance, now car runs perfect, no durametric
Thank you all for the invaluable info and help you provided.
Now the problem is that with vibrations the 2 connectors with broken lock may eventually disconnect from the coils. Can i buy new ones without replacing all wiring?
Thanks again. Cheers.