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1998 Mercury Mountaineer no power

Tiny
CASEY MCCALLEY
  • MEMBER
  • 1998 MERCURY MOUNTAINEER
  • V8
  • AWD
  • AUTOMATIC
  • 150,000 MILES
Have replaced fuel filter, camsensor, fuelpresure regulator.O2 sensor. Come to a hill will not go up will idle up to seed if you feather pedal. Butwhen up to speed does not shift. Have cheched codes has alot but can, t be every thing. Put in idle seems good put in gear drops power.
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Friday, September 10th, 2010 AT 4:23 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Lack of acceleration, chugging, hesitating, jerking, bogging, misfiring etc. Could be caused by one of the following below:

Oxygen sensor.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Crankshaft position sensor
Knock sensor
Manifold absolute pressure sensor.
EGR Valve
Fuel pressure regulator leaking or defective fuel pump.
False air leakage.
Fuel contamination.
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.
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Friday, September 10th, 2010 AT 7:34 PM

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