Black Smoke

CHEVROLET TRUCK
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RMAYORGA
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  • 1 POST
i have a 1998 chevy Z71 with 180,000 miles, the problem that i am having is that when i am on the highway and punch the gas, black smoke and soot come out of my exhaust.

i have tried several things from changing the sparkplug wires and plugs to trying various off the shelf products that claim to help stop this and clean your fuel system. I have also had different mechanics look at it and have not been able to fix my problem. On top of the smoke my gas mileage is really bad, with a 25 gallon tank, im lucky to get 180 miles out of it.

i'm at the point that i am contemplating replacing the engine, thinking this will save me money than continuing to have mechanics look at it. Is there any one else that has found a good soulution.
Jun 20, 2007 at 12:04 AM
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E40WATER12
  • ASE Certified Mechanic
  • 522 POSTS
  • ASE Certified Mechanic
Sounds to me you got a fuel problem, How are the O2 sensors, Also I would get a pressure test done to the fuel pump, Also would inspect the fuel injectors, Could be dirty or fouled.
Jun 20, 2007 at 3:43 AM
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