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1989 Chevrolet Silverado blowing black smoke and backfireing.

Tiny
HOYT1995
  • MEMBER
  • 1989 CHEVROLET SILVERADO
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 208,000 MILES
My truck is blowing black smoke from it running to rich also its backfiring Im on here to get suggestions before I put it in the shop if I cant figure it out
Sunday, February 15th, 2015 AT 5:51 PM

2 Replies

Tiny
HOMER1967
  • MECHANIC
  • 875 POSTS
Does the temperature gauge work? If yes, is it getting up to normal temp?
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Sunday, February 15th, 2015 AT 6:00 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,239 POSTS
THis can happens when the fuel pressure regulator goes out and leak raw fuel into the intake manifold. I would just get a new throttle body with new fuel injectors. Check out the images (below). Let us know how it goes.
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Thursday, June 27th, 2024 AT 5:49 PM

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