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1996 Saturn SC2 low power at operating temp.

Tiny
BUSTERMAXA
  • MEMBER
  • 1996 SATURN SC2
  • 4 CYL
  • FWD
  • MANUAL
  • 174,000 MILES
My twin cam 1.9 runs great when the engine is cold when it gets to operating temp. It has low power. I have replaced the throttle position sensor, O2 sensors, and the cat. And the fuel filter, spark plugs and wires. I am running out of ideas.
Friday, March 19th, 2010 AT 11:55 PM

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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Saturday, March 20th, 2010 AT 1:44 AM

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