98 K1500 5.7L BUCKS AND BACKFIRES??

1998 GMC Sierra

Tiny

petrusob

December, 26, 2011 AT 4:15 AM

When you give it gas it bucks and backfires, take foot off pedal and idle runs good, as soon as you give it gas bucks backfires and sometime stalls but always starts up fine. What can it be?

FOUND 1244 RELATED QUESTIONS

1 Answer

Tiny

rivermikerat

December, 26, 2011 AT 4:27 AM

Check the TPS and ignition timing. Also check compression. It could be a burned valve.

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