murple missfire

Asked by Carl Apr 04, 2015 at 09:27 AM about the 2004 GMC Sierra 2500 4 Dr SLE 4WD Crew Cab SB

Question type: Maintenance & Repair

check engine light comes on after 3 hours of driving and only after refueling have replace plugs wires 1 coil filter and 3 gas caps

2 Answers
102,635

Reelin68 answered 9 years ago

Sounds like you may have a problem with the purge solenoid in your EVAP system. https://www.youtube.com/watch?v=o_kxHJkzF-I

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90

Mario answered 9 years ago

It could be multiple things. you need an oscilloscope to see what your vehicle is doing. I came across an issue with a vehicle having random misfires and it was out of timing

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Your Answer:

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