outback idle and accelerate

2001 SUBARU OUTBACK
119,589 MILES • 4 CYL • 4WD
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PHILR.
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  • 1 POST
two things please: took 2001 outback in for 120kcheck.Only problem was high idle with foot on brake. mechanic told me not to be concerned. More important,transmission shifted just fine but mechanic drained fluid &added new.Now on occasion it seems to have a hesitation when engaging gas pedal from stop light.
Jan 16, 2011 at 1:31 AM
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RASMATAZ
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  • 75,992 POSTS
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
Jan 16, 2011 at 1:42 AM