Mechanics

WHAT ARE SOME OF THE CAUSES FOR VEHICLE TO*****

1999 GMC Yukon • 165,000 miles

Between 45-50 mph truck****** while going uphill or overpasses
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Hattsy
December 5, 2011.




Do you have a check engine light?

What exactly is it doing?

Tiny
Rasmataz
Dec 5, 2011.
No engine light When taking off when the truck reaches 45-50 it****** then levels off. When going uphill or over bridges it****** or acts as if getting no fuel

Tiny
Hattsy
Dec 5, 2011.
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.

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 and keep testing.
AD

Tiny
Rasmataz
Dec 5, 2011.
Hattsy, did you get this fixed yet?

Rivermikerat
Feb 11, 2012.

AD