Backfiring at WOT?!?!

Soooo... just rebuilt the engine, new seals new gaskets, new everything. I have a ported set up with a 15.15 sha and a shorty intake to match. Before i was having issues and decided to rebuild the engine i was hitting speeds of about 35-37 mph... now I hit about 30 and it back fires like a bitch... Tried running with and without an air filter.. should i downjet or what do you think it is?

Re: Backfiring at WOT?!?!

anything helps!

Re: Backfiring at WOT?!?!

John Warren IhazJawas /

i recently tore apart my carb and cleaned and i also seem to back fire or misfire but i think its an electrical issue since it seems to do it after i hit my turn signal at wot

Re: Backfiring at WOT?!?!

OH and its a moby 50v 1978 sorry forgot to mention that.

Re: Backfiring at WOT?!?!

my ciao does that when it has air leaks at the pipe or carb.

Re: Backfiring at WOT?!?!

Timing, block exhause or vacuum leak

Re: Backfiring at WOT?!?!

timing retarded

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