1997 Gmc Yukon Vehicle Gives Out Black Smoke Replaced Fuel Pump Got Engine

1997 GMC YUKON
160,000 MILES
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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.
Nov 12, 2012 at 7:21 AM
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RASMATAZ
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-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
Nov 12, 2012 at 9:30 AM
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