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1991 Mercury Marquis
My 91 grand marqui is slow to accell when I press the gas pedal
have the same problem?
Saturday, February 12th, 2011 AT 8:20 PM
Do you have a check engine light on?
Lack of acceleration, chugging, hesitating********, bogging, misfiring etc. Could be caused by one of the following below
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Crankshaft position sensor
Manifold absolute pressure sensor.
Fuel pressure regulator leaking or defective fuel pump.
Foul/defective spark plugs.
Open spark plug wires.
Ignition coil/Coil packs defective.
Incorrect ignition timing.
Cap and rotor.
Note:If it doesn't apply disregard it and keep testing.
Saturday, March 12th, 2011 AT 12:34 AM
to post a reply.
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