Piston Port Backfire

[Shonuff]

I've got a 1991 440 that's backfiring through the carb. It seems to idle a little high and revs for the most part but the backfire is persistent.

What's up with that?

 

[550 SLUT]

timing is off

 

[standupjetskirider]

prob a sheared flywheel key...

 

[SuperJETT]

prob a sheared flywheel key...

Yeah, it might have been, almost 5 years ago.

 

[Shonuff]

prob a sheared flywheel key...

Thanks.