Mechanics

GMC YUKON BLACK SMOKE PROBLEM

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.
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Guest
November 12, 2012.




-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

Rasmataz
Nov 12, 2012.


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