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1999 BMW 740 acceleration problem

Tiny
740KSLAV
  • MEMBER
  • 1999 BMW 740
  • V8
  • 2WD
  • AUTOMATIC
  • 121,000 MILES
HI, MY 1999 740IL HAS A PROBLEM WITH IT'S ACCELERATION. WHEN GAS PEDAL IS PUSHED 10% DRIVES OK, 50% SHE STOPS ACCELERATING, CHOKES, AND BACKFIRES BUT WHEN PEDAL IS PUSHED 100% IT COMES BACK TO LIFE AND ACCELERATES GOOD WHILE BEING PUSHED 100% DOWN THE WHOLE TIME. (WORK DONE) REPLACED SPARK PLUGS WITH NEW BOSCH PLATINUM+2'S, AND ADDED MULTIPLE FUEL CLEANERS AND PROBLEM STILL EXIST'S. ALSO WHEN CHANGING PLUGS THEIR WAS SOME OIL IN PLUG AREA, GUESSING LEAKING VALVE COVER GASKET, BUT DON'T THINK THAT IS THE WHOLE CAUSE OF PROBLEM JUST PART OF IT. WHAT DO YOU THINK?
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Sunday, February 8th, 2009 AT 5:51 PM

1 Reply

Tiny
DOCHAGERTY
  • MECHANIC
  • 9,601 POSTS
Oil in the spark plug wells means you may be risking shorting out a coil or coils, replace the valve cover gaskets and closely inspect the coils, any signs of leakage or bulging could be an indicator of a failed coil or coils.
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Sunday, February 8th, 2009 AT 9:43 PM

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