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Old 03-08-2018, 11:01 AM
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Location: Keller, TX
Cobra Make, Engine: Lonestar Classics LS427. Self-built 408W, AFR 195 heads, Performer RPM Intake, Quick Fuel 750, 407rwhp, 479rwtq
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Sometimes it is a lean condition. Easy to check and it is reversible. Try richening up the idle mixture just a touch. If it is a standard Holley style carb, turn all (2 or 4) idle screws counter clockwise by 1/8 of a turn. If that doesn't fix the popping on decel, put them back where they were and work on the pipes.

Last edited by Texasdoc; 03-08-2018 at 11:06 AM..
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