part throttle bog/hessitation/backfire

67Dart273 said

Ignition problems would be much worse under more power. I would guess carb problems.

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i have the msd pro billet dizzy with the mech. advance. i wonder if the inside got corroded and is limiting advance or its hanging up.

i have heard horror stories about the new gas causing problems inside the carb if it sits too long too.

i have a fuel cell with the foam inside. wonder if the foam is breaking down and got some sucked into the carb?