1999 GMC Suburban
Problem for GMC 1999 Suburban

I got a 1999 gmc suburban and the number 6 spark




By stus_repair on Jul 25, 2009

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I got a 1999 gmc suburban and the number 6 spark plug keeps fouling out replaced the injector what could be the problem

Solution #1

posted on Nov 10, 2009
Not Rated)

boizrus

Rank: Apprentice 
Rating: 0%, 0 votes
I had the same problem. To see if it was a bad a wire, I switched the spark plug wires on #6 and 8. Haven't had a problem since. I think it might have been the plug wires being re-seated when I swithced them took care of it.
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Solution #2

posted on Jul 25, 2009
Not Rated)

Rayvin1943

Rank: Guru 
Rating: 88%, 41 votes
what is it fouling with. If its fuel check spark and plug--if it's oil-more serious- could be valve guides or seal or worse could be an oil ring. Either way it is going to be expensive.
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