Engine backfires and sputters when floored

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greenz97

Newbie
Joined
Apr 19, 2022
Messages
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Location
marin
I have 97 K1500 with the 5.7 vortec and when I floor it the truck hits 3k rpm and starts backfiring like crazy and dying out. regular driving is just fine and it only happens when I floor it. No check engine light temp and oil pressure look fine.
Any ideas?
 
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