Rough idling

Tiny
MICHALE
  • MEMBER
  • 1999 CHEVROLET TAHOE
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 211,000 MILES
I have rough idling and I have one of my exhaust H pipe missing. I saw flames coming out of the catalytic converter with the missing pipe.
Sunday, July 28th, 2019 AT 2:05 PM

5 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good afternoon,

If you have flames in the exhaust, it sounds like a timing issue.

Did you check the firing order of the wires from the cap to the plugs?

I would also check the compression in the motor as well.

https://www.2carpros.com/articles/how-to-test-engine-compression

Roy
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Sunday, July 28th, 2019 AT 2:16 PM
Tiny
MICHALE
  • MEMBER
  • 8 POSTS
No, I haven't but know I will.
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Sunday, July 28th, 2019 AT 2:21 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Keep me updated.

Roy
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Sunday, July 28th, 2019 AT 2:24 PM
Tiny
MICHALE
  • MEMBER
  • 8 POSTS
Well, I changed the spark plugs and 2, 4, 6, and 8 plugs were coated black 1, 3, 5, and 7 were not haven't checked the timing yet will do as soon as I get the spark plug wires.
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Monday, July 29th, 2019 AT 7:48 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Sounds good.

Roy
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Monday, July 29th, 2019 AT 10:08 PM

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