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1999 GMC Yukon Repair Question


Topics covered: Sensor, Engine, Spark.
Mileage: 165,000 miles.

Asked on December 5, 2011

What are some of the causes for vehicle to*****

Between 45-50 mph truck****** while going uphill or overpasses
Avatar Asked by hattsy

Answer

Replied on December 5, 2011

Do you have a check engine light?

What exactly is it doing?

Tiny Answered by rasmataz
68 questions asked
Replied on December 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 Response from hattsy
1 question asked
Replied on December 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.

Tiny Answered by rasmataz
68 questions asked

Replied on February 11, 2012

hattsy, did you get this fixed yet?

Tiny Answered by rivermikerat (expert)
5,494 answers provided