2000 Caddillac Deville, 4.6L V8 engine, 102000.
Started to stall at red light or stop light, and engine revving irratically. At times rev very high then very low, then irratic low to high, and coming to stop would make it stall.
Service Engine Light comes on, run the on board Diagnostic codes and get PCM P0101, P0171, P0174. New rebuilt Mass Air Flow sensor put in three times, returned several due to same problem. Fuel filter changes, air filter changed, put in new throttle sensor, checked EGR valve, not sticking, Put on new Catalytic converter, and all three O2 sensors replaced with brand new.
Car still comes up with PCM P0101, Mass air flow sensor problem, and the irratic revving and stalling continue.
Have exhausted all possible fixes that I know of.
One more code: C0663, Exhaust valve control circuit high. Could this be the problem and how can I fix it?
Thank you so much!
have the same problem?
Wednesday, July 4th, 2007 AT 8:26 AM