muncie325i
03-31-2005, 07:14 PM
I've taken my 92 325i to a local import mechanic because it is missing out and backfiring. I've already cleaned the idle control valve, replaced the O2 sensor, changed plugs, etc.
The shop tells me it is misfiring on cylinder 5, so they have swapped coils, cleaned and swapped injectors, carbon cleaned intake, and checked for vacuum leaks. No luck. They found that the air mass meter is not working properly - when air filter is removed, it says airflow actually goes down. This is definitely a problem, but why would it be worse on one cylinder? They also say that the ECU is not original and is a euro ecu, but don't know if that is a problem. I wish I had a spare of each to try, but can't find a donor car around here. Please help, I don't want to throw money at things that won't fix my car!
The shop tells me it is misfiring on cylinder 5, so they have swapped coils, cleaned and swapped injectors, carbon cleaned intake, and checked for vacuum leaks. No luck. They found that the air mass meter is not working properly - when air filter is removed, it says airflow actually goes down. This is definitely a problem, but why would it be worse on one cylinder? They also say that the ECU is not original and is a euro ecu, but don't know if that is a problem. I wish I had a spare of each to try, but can't find a donor car around here. Please help, I don't want to throw money at things that won't fix my car!