91 fullsize blazer backfiring problem

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Nov 7, 2010 | 12:16 PM

scrmmealuvsong22

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91 fullsize blazer backfiring problem

My 91 fullsize blazer just got new head gaskets but when started up it backfires like pop corn popping after a few minutes it will stop and truck runs fine any idea why it's popping

Nov 7, 2010 | 01:32 PM

swartlkk

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From: Waterloo, NY

It sounds like your timing may be too far advanced for cold start up. What was the timing set to after the head gasket replacement?

Nov 8, 2010 | 08:02 AM

scrmmealuvsong22

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I was not the one who set timing on the truck so I couldn't tell u off hand but all specifications came from
my haynes Manuel for that truck

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