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From: Hank Dozier
Remote Name: 18.104.22.168
Date: May 28, 2002
Several reasons (minor and MAJOR) that could cause that condition. Do not know what type of carb (BBD, WCFB, AFB, Holley, Bendix-Stromberg), but general reasons could be: 1) If only cold, then weak chocke or sticking choke plate for lean mixture 2) If hot, then either weak accel pump or low float level 3) If engine is "popping back" on decel under way, then could be burned or highly receded exhaust valve. 4) Timing chain stretched and/or jumped a tooth 5) Combination of above. 6) Air leak at carb base, or at manifold/head interface, Check by spraying ether against surfaces and listen for RPM change. DO THIS WITH YOUR AIR CLEANER ON, unless you like fires. 7) Something else which is totally carb type related.