2001 Silverado misfiring check engine light flashing but no code

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Sep 13, 2019 | 11:28 PM

Christian Patbergs

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2001 Silverado misfiring check engine light flashing but no code

Sep 14, 2019 | 6:21 AM

oilcanhenry

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Quote:

Originally Posted by Christian Patbergs

I'd suspect an ignition issue. 18 year old vehicle could be many things. I am thinking vacuum leak or TBI issue myself. I'm an old dude so hooking up a vacuum gauge, not used much anymore, would be a good start. Before OBD, that was used all the time. It likely will fluctuate but its a good start if the OBD II isn't showing any codes.

Sep 26, 2019 | 7:27 AM

Ricardowelch

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Quote:

Originally Posted by Christian Patbergs

I have a 2001 Silverado it’s 6.0 swapped and started misfiring, the check engine light flashes when moving but when sitting still it doesn’t flash but when I plug it into a scanner no codes popped up and I have tried multiple scanners. Visiting Autoguysland site to know what we should do when check engine lights on but no codes if you concern.

It is probable cause as ignition system Fault- spark plugs, Ignition wires or Vacuum leak Injector fault High or low fuel pressure. You should check them.