Fouled plugs

Tiny
TGREEN8371
  • MEMBER
  • OLDSMOBILE
I have a 97 olds bravada V6 with 130,000 miles. My fuel milliage went way down to 6 mpg. The 1, 3, and 5 plugs get fouled with black soot when the engine is started. I have replaced the head gaskets, and the normal tune up stuff (ie plugs, wire, cap, rotor) and put in injector cleaner. The engine runs fine at itle and not in gear, but no real power while in gear unless petal is on the floor. What else could cause half of the engine to foul out
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Wednesday, October 31st, 2007 AT 9:09 AM

2 Replies

Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
Too rich a fuel mixture would be my guess. Check the MAF sensor and scan the car for trouble codes
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Wednesday, October 31st, 2007 AT 7:22 PM
Tiny
TGREEN8371
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I replaced the computer yesterday, the onboard MPG is still saying I am only getting 3-6 miles per gallon. Before I had done anything to it, it was getting about 6 miles to the gallon.
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Thursday, November 1st, 2007 AT 9:22 AM

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