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2002 Mitsubishi Eclipse No acceleration.

Tiny
RICKEH
  • MEMBER
  • 2002 MITSUBISHI ECLIPSE
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 140,000 MILES
The car will still drive, it just jerks. It tops out at around 45 miles per hour. Even when it is idling in park it jerks. When driving, if you let off the gas, it stops. The more gas you give it, the worse the jerk. It's been to several mechanics and they can't point it out exactly, the check engine light has been on for the last year, it game on and was diagnosed as the O2 sensor. One mechanic said it could be running rich, (Fuel issue), fuel filter/pump. Any info would help greatly, thank you.
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Monday, March 22nd, 2010 AT 8:51 AM

1 Reply

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

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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Monday, March 22nd, 2010 AT 7:38 PM

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