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!

Asked by Alex Orlando Corneli... Jul 29, 2015 at 03:36 PM about the 2000 Mercury Grand Marquis LS

Question type: Maintenance & Repair

4 Answers

70,285

how much fuel volume / pressure is at the intake at idle and cruse?

1 people found this helpful.
Best Answer Mark helpful
157,795

Possible clogged catalytic converter. Have someone check the converter and the exhaust system.

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