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|3-Series (E46, E90) Chat relating to the BMW 3-Series from 1999 to Current. Models include: BMW 316i, BMW 318i, BMW 318Ci, BMW 320i, BMW 323i, BMW 325i, BMW 330i, BMW 328 Ci, BMW 328i, BMW 325i/xi, BMW 330Ci, BMW 320d, BMW 330d, BMW 335d.|
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| Originally posted by jasonharlos@May 17 2005, 08:10 PM |
I have a '99 328i with 83,000k miles that is periodically misfiring. The check engine light comes on and I get two codes: P0303 (Cylinder 3 misfire), and P1250 (Air/Fuel Mixture, related to Air Mass Meter). It always happens on the same cylinder. Whenever the car starts to misfire, it will stop after I shut off and restart the car. I check the connector on the Air Mass Meter and it appears to be fine. Can anyone provide with some ideas on what to check? It doesn't make sense to me that it would be the spark plug or wire since the car will sometimes run for several days without a problem. Performance does not seem to be affected either.
| Originally posted by EuRopE1981@May 17 2005, 11:16 PM |
I would check the coil on the cylinder, my car was doing the same thing on cylinder 5
swap the suspect coil with a non-suspect coil. clear the error codes, run the car, shut it off. check the error codes again. if the error followed the suspect coil, voila. if not, it's another problem.
check the spark plug shaft for oil residue while you have the coil out.
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