between 45-50 mph truck****** while going uphill or overpasses
Dec 5, 2011 at 7:58 PM
what are some of the causes for vehicle to*****
1999 GMC YUKON
HATTSY
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Do you have a check engine light?
What exactly is it doing?
What exactly is it doing?
Dec 5, 2011 at 8:02 PM
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
Dec 5, 2011 at 8:31 PM
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.
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.
Dec 5, 2011 at 11:30 PM
hattsy, did you get this fixed yet?
Feb 11, 2012 at 6:47 AM
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