1997 BMW 540I POOR IDLE, MISFIRE CODES DETECTED, CAN HEAR L

  • Tiny
  • jmalander
  • 1997 BMW 540i

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?

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Monday, July 5th, 2010 AT 10:15 PM

1 Reply

  • Tiny
  • Dr. Hagerty
  • Expert
  • 9,718 posts

The PCV plate or intake manifold gasket may be compromised.

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Tuesday, July 6th, 2010 AT 12:47 AM

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