What caused this, i did some work on my blocker plate, sealed it up good with jb weld. I unhooked the battery for a little over 10 minutes and hooked it back up, i let it run for a while and idle... then i take it out and let off the gas, as soon as i hit it again a huge fireball shoots out my exhaust and it backfires louder than a 12 gauge... i don't get what's up with this.

 

Do you mean the carb spacer? You could have sealed a tiny vacuum leak that your carb had been tuned to overcome. When you sealed it up well, it made your carb idle rich.

 

13b efi... i keep forgetting to specify.

 

Don't worry, we'll remember eventually :P

Jon

 

Like I said check the voltage reading for the AFM and see if that is what is making it dump so much fuel in.

 

Yeah, i posted this before asking you.

 

Lol, my gsl used to do that.... scared my g/f's dad into hitting the deck when i shut it down.... he thought the red neck neighbors were shooting at him... *grin*