Mechanics

ACCELERATION PROBLEM

2005 Mercury Mountaineer • 4WD Automatic •

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mercury mountaineer****** when accelerating going up hill
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Ken o'steen
June 22, 2011.



Do you have a check engine light and when was last tune-up

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.
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 and keep testing.

Rasmataz
Aug 4, 2011.