misfire

1999 CHEVROLET SUBURBAN
180,000 MILES • 5.7L • V8 • 4WD • AUTOMATIC
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MOABJUNKIE
  • MEMBER
  • 1 POST
misfires right off idle. all ignition is brand new.
Aug 30, 2017 at 8:09 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,224 POSTS
It sounds like you have an injector that is not working right. when you had all the spark plugs out did all of the spark plugs look the same color or was one different? This will be the cylinder that is having a problem. Do you have any codes? Here is a guide to help you read them:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Please let us know what you find.

Cheers, Ken
Aug 31, 2017 at 3:10 AM
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