Mechanics

BACKFIRES

1993 GMC Safari • 6 cylinder • 200,000 miles

1993 gmc van backfires on start up run poor till warm up
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Pamwalt1
February 21, 2011.




Do you have a check engine light? If so get codes read and post to this thread.
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Mmprince4000
Feb 21, 2011.
No the check engine light not on had it on computer showed nothing thought water in gas added dry gas ran good 3day filled new gas stsrted to backfire again

Tiny
Pamwalt1
Feb 21, 2011.
Backfire is a timing issue, either dist. Or a valve hanging open.

Mmprince4000
Feb 21, 2011.

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