IDLING LOW...MASS AIR FLOW ERROR

  • Tiny
  • Koru
  • 1997 BMW M3
  • 6 CYL
  • 2WD
  • manual
  • 133,000 miles

My 1997 BMW m3 is idling low and very rough (around 500rpm) it seems to drive fine but sometimes dies while idling.I took it into a mechanic and got a "mass air flow" error. Any suggestions on what that could mean and how to fix it?

Tuesday, June 21st, 2011 AT 11:38 PM

1 Answer

  • Tiny
  • Sixpack Subaru
  • Member

If it isn't the actual MAF, (Mass Air Flow), sensor, it can be checked at certain engine speeds for certain voltages within set parameters, then I would be looking for vacuum leaks around the inlet manifold and associated plumbing/fittings. If it is the MAF, I have had great success rates, (over 80%), from simply cleaning the Sensor plate/wire with White Spirit, (100% hydrocarbon), and a careful compressed air delivery in the same direction as engine airflow.

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Wednesday, June 22nd, 2011 AT 1:59 PM

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