My 2000 Mercury Grand Marquis won't accelerate pass 40mph. Diagnosis check reveals nothing wrong with the major functions of the engine. C foam was my best guess. Then the wheel speed sensor. Thanks!
how much fuel volume / pressure is at the intake at idle and cruse?
Would love to answer but I don't know accept I idle the car with engine running a lot.
Possible clogged catalytic converter. Have someone check the converter and the exhaust system.
one or the other....unless its so retarded/worn.
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