2005 GMC Truck engine surges

2005 GMC TRUCK
53,000 MILES • V8 • AWD • AUTOMATIC
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RANDY BOVY
  • MEMBER
  • 1 POST
Our GMC Denali is surging when cold going up the hill on our driveway. When warm it seams to quit.
History
Just had a transmission put in by Chev about two months ago with the same problem.
Jun 13, 2010 at 7:05 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,992 POSTS
You sure the tranny is not slipping? if not do below

Inspect and test all the following listed below:

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,fuel filter 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.
Jun 14, 2010 at 1:00 AM
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