I PULLED A CODE OF THE COMPUTER PO300 RANDOM/MULTIPLE CYL MISFIRE DETECTED. CAR HAS 120K. SERVICE ENGINE LIGHT ON.
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2001 Buick LeSabre Question: cly misfireing
Answer #1Bret Bodas January 30, 2010, 15:34Master
Check this out: http://repairpal.com/OBD-Code-P0300
gmmastertech January 30, 2010, 16:15Rookie
Get it fixed asap, could be leaking coolant in to engine through leaking upper intake manifold. Check your coolant level in overflow bottle and radiator (when cold) to verify. If it is a leaking intake could cause engine to hydrolock and more severe damage will result.
Answer #3igmosblossom April 07, 2010, 14:11Rookie
I just had simular problem. Was the ignition control module. Runs great now. No misfiring.