Why is my car still misfiring?

Asked by Kevin Nov 08, 2021 at 08:41 AM about the 2005 BMW 3 Series 330xi Sedan AWD

Question type: Maintenance & Repair

I have a 2005 BMW 330xi was misfiring on all
cylinders. I changed all the spark plugs and coils
and it is still misfiring, except on cylinder 1.

1 Answer
7,855

apbimmer98 answered 3 years ago

You'll need to go through the basic diagnostics for a multi cylinder misfire, which can be found on various BMW forums. I suggest starting with checking for vacuum leaks and fuel pressure. The lean code could suggest that you're not getting enough fuel pressure.

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