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G3GM 1973 to 1977 A-bodys. Chevelles, Monte Carlos, El Caminos, Laguna, 442, Cutlass, Malibu, GTO, LeMans, Century, Regal, Grand Am, Grand Prix, Sprint, Gran Sport, Can Am, Hurst-olds, and other 73-77 A-bodies
ok so ibought a used 305 with a newer cam and liftes and timing chain set was told motor was running wheni picked it up no specs for cam but not OEM spec this i know got it in just got it running today finally got to idle by adjusting the idle screw however it makes a loud pop out of the exhaust ever so randomly but stays running if im slightly on the gas dies if at idle runs smooth with throttle open but it jus tpops every now and again i also noticed my tachometer was jumping around between 1k and 2k rpm could this be a sign that the internals of my distributor need repalced or maybe my ratty old plug wires ? i know the cap and rotor are new plugs are gapped and looked good when installed idle mix screws are 1.5 turns out.