1989 Chevrolet Silverado blowing black smoke and backfireing.

1989 CHEVROLET SILVERADO
208,000 MILES • 5.7L • V8 • 4WD • AUTOMATIC
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HOYT1995
  • MEMBER
  • 1 POST
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
Feb 15, 2015 at 9:51 AM
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HOMER1967
  • ✓Experienced Mechanic
  • 875 POSTS
does the temperature gauge work ? if yes, is it getting up to normal temp?
Feb 15, 2015 at 10:00 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,554 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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Jun 27, 2024 at 10:49 AM
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