My 05 silverado is idling rough. CEL started flashing while parked. Soon after CEL went off and truck was idling fine.

320

Asked by Dec 21, 2013 at 07:45 PM about the 2005 Chevrolet Silverado 1500 LS Crew Cab 4WD

Question type: Maintenance & Repair

My 05 silverado is idling rough. CEL
started flashing while parked. Soon
after CEL went off and truck was
idling fine. I just filled the tank and
tried to squeeze a little extra fuel in.
Just happened an hour. Any
thoughts.

5 Answers

113,245

Filled it up before this happened? Need to stop filling at first click of handle. The extra fuel might have backed up into canister system causing the issue. Not sure just a thought. Have cel codes read to know more about what happened. A blinking cel is not a good thing. When it's blinking you should turn engine off before possible major damage.

2 of 2 people found this helpful.
320

What code should I get if it is a over fill issue?

2 of 2 people found this helpful.
69,375

A flashing check engine light is warning you that the engine is misfiring and causing damage to the catalytic converter. You'd probably get a rich air/fuel mixture trouble code. If your Silverado has over 100,000 miles on it and has not had a tune-up, you're due. HTH. -Jim

2 of 2 people found this helpful.
320

Jim: just bought it used with 108k. What do you think, plugs wires, etc?

1 of 1 people found this helpful.
69,375

Yes, definitely. At 108,000 miles it's probably never been tuned up yet. Get the iridium spark plugs. They're a little more expensive but will last another 100,000 miles. HTH. -Jim

1 of 1 people found this helpful.

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