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My vehicle gives out black smoke

Tiny
ANONYMOUS
  • MEMBER
  • 1997 GMC YUKON
  • 160,000 MILES
My vehicle gives out black smoke. I have replaced the fuel pump, I got the engine and injector system flushed but still the black smoke comes and engine oil becomes black within four days.
Monday, November 12th, 2012 AT 7:21 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
-Your A/F mix is too rich-possibly stuck in the open loop mode, a dead 02 sensor, leaky injectors and fuel pressure regulator-Check the fuel pressure with a gauge if its within specs-though its new-start here
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Monday, November 12th, 2012 AT 9:30 AM

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