2CarPros - Car Questions & Answers

1997 BMW 540i Repair Question


Topics covered: Air filter, Engine, Engine performance.
Mileage: No information provided.

Asked on July 5, 2010

Poor idle, misfire codes detected, can hear l

Engine Performance problem
1997 BMW 540i V8 Two Wheel Drive Automatic 151000 miles

I have this car that has misfire detection in cyl. 8 and I've changed the spark plugs, moved coils around, changed fuel and air filters, moved plugs around, cleaned electronic idler valve. Still getting misfire detection in cyl. 8 after resetting the codes with a OBD reader. Kind of lost here. Any ideas?
Avatar Asked by jmalander

Answer

Replied on July 6, 2010

The PCV plate or intake manifold gasket may be compromised.

Tiny Answered by Dr. Hagerty (expert)
9,720 answers provided