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

Tiny
HATTSY
  • MEMBER
  • 1999 GMC YUKON
  • 165,000 MILES
Between 45-50 mph truck****** while going uphill or overpasses
Monday, December 5th, 2011 AT 7:58 PM

4 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Do you have a check engine light?

What exactly is it doing?
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Monday, December 5th, 2011 AT 8:02 PM
Tiny
HATTSY
  • MEMBER
  • 2 POSTS
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
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Monday, December 5th, 2011 AT 8:31 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
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.
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Monday, December 5th, 2011 AT 11:30 PM
Tiny
RIVERMIKERAT
  • MECHANIC
  • 6,110 POSTS
Hattsy, did you get this fixed yet?
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Saturday, February 11th, 2012 AT 6:47 AM

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