CHEVY BOGGS DOWN ... NO POWER

2004 Chevrolet Trailblazer

Tiny

icecreamjoe

July, 14, 2010 AT 7:22 PM

Engine Performance problem
2004 Chevy Trailblazer 6 cyl Four Wheel Drive Automatic 100000 miles

We checked the catalytic converter and it didn't have back pressure. Changed the oxygen sensor. Changed actuaror.
What else could be the problem? When driving won't down shift after accelerates.

FOUND 16219 RELATED QUESTIONS

1 Answer

Tiny

rasmataz

July, 14, 2010 AT 7:35 PM

Possibilities: Inspect and test all the following listed 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.

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