Question about 2000 BMW 7 Series
Car runs fine,but when at idle it idles a litle up and down specially with the ac on
IT HAPPENED THAT SOMEBODY CHANGED THE CLUTCH AND THE FLYWHEEL AND INSTALLED THE WRONG FLYWHEEL AFTER WE INSTALLED A NEW FLYWHEEL THE PROBLEM WAS GONE.BUT THANKS ANYWAY.
Posted on Oct 12, 2008
Have your timing checked as these codes suggest that you are advanced on one bank and retarded on the other bank, also have your coil pack tested. as for surging up and down while the a/c is on this is normal.
Posted on Oct 10, 2008
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Posted on Jan 02, 2017
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This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve but always run a OBD2 fault code as well as the cleaning procedure. Buy a can of throttle valve cleaner (do not use carburetor spray cleaner!) from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the engine is running, use up about 1/2 the can, engine will try to stall hold the speed up, shut it down and let it soak for 30 minutes, restart and blow out the remaining fluid, shut it down and disconnect the negative battery cable for 5 Min's to reset the base idle control
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