Mechanics

ENGINE SURGES

1996 GMC Yukon • 4WD Automatic • 240,000 miles

Engine surges till it reaches running temp
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Rdhellraizer
August 9, 2011.



Do you have a check engine light and when was last tune-up??

Refer to this link: http://www.2carpros.com/articles/engine-surges

Could be one of the following below -check and test:

Oxygen sensors.
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.
Fuel contamination.
Foul/defective spark plugs.
Open spark plug wires.
Ignition coil/Coil packs defective.
Incorrect ignition timing.
Cap and rotor.

Rasmataz
Aug 9, 2011.