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Jerking Engine

Tiny
RICHARD R
  • MEMBER
  • 2005 GMC YUKON
  • V8
  • 2WD
  • AUTOMATIC
  • 72,000 MILES
Why does vehicle have an intermittent***** when idle / stopped for a red light?
Thursday, July 7th, 2011 AT 7:54 PM

3 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Do you have a check engine light on and when was last tune-up?

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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Thursday, July 7th, 2011 AT 8:08 PM
Tiny
RICHARD R
  • MEMBER
  • 2 POSTS
No check engine light and last tune up was done end of last summer.
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Thursday, July 7th, 2011 AT 9:22 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Do what I've suggested and comeback with testing results
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Thursday, July 7th, 2011 AT 9:38 PM

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