1996 Chevy Tahoe 4 & 6 Spark plugs foul out

Tiny
MONTY84TA
  • MEMBER
  • 1996 CHEVROLET TAHOE
  • V8
  • 4WD
  • AUTOMATIC
  • 145,000 MILES
I had a engine miss in the number 4 & 6 cylinder. I bought all the tune up parts to fix it. When I pulled the number 4 & 6 plugs out they where completely white and ceroded over. I finished the tune up and the truck ran great for about a week. It did the same thing to those two plugs. I replace the spider fuel injection system and it did the same thing again. Please give me some info on where to turn next.

Thank you.
Tuesday, June 2nd, 2009 AT 1:53 PM

5 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
That is usually a sign of coolant in combustion chamber. Any coolant loss?
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Tuesday, June 2nd, 2009 AT 2:17 PM
Tiny
MONTY84TA
  • MEMBER
  • 3 POSTS
No, I have never lost any coolant. The radiator and bottle are both full.
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Thursday, June 4th, 2009 AT 2:37 PM
Tiny
DOCFIXIT
  • MECHANIC
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Can you post a pic of the plugs?
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Thursday, June 4th, 2009 AT 2:57 PM
Tiny
MONTY84TA
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  • 3 POSTS
I will take some and send them to you.
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Thursday, June 4th, 2009 AT 4:00 PM
Tiny
DOCFIXIT
  • MECHANIC
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Excellent
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Thursday, June 4th, 2009 AT 4:43 PM

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