1995 Mitsubishi Galant hesitation

Tiny
LAURIEPARKER
  • MEMBER
  • 1995 MITSUBISHI GALANT
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 140,000 MILES
My Galant hesitates or bogs anytime I press into gas 1/3 of the way down. If I accellerate very smoothly it wont bog. It will hesitate cold or warm, seems worse after car is warm and really bad if I am on an incline or needing to accellerate quickly, or just leaving a stop light and stepping on gas slightly too hard. Feathering the gas does not help. I have a check engine light on and the code pulled said rear O2 sensor bad, I have not chaged it yet. I have changed spark plugs in last 5000 miles, fuel filter twice in that time, and have added 4 cans of fuel injector cleaner to the gas tank. I drive 20 miles to work everyday at highway speeds and have no trouble when car is at those speeds, but accellerting is smooth then, even on hills in cruise control. The car starts great and idles fine.
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Sunday, April 11th, 2010 AT 8:03 AM

1 Reply

Tiny
2CEXPT
  • MEMBER
Inspect and test all the following listed below and get back with some results

Oxygen sensor.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position 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.
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Sunday, April 11th, 2010 AT 8:31 AM

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