Big Boom Through Carb!

[tripwire1969]

I know I'll get chewed out for not enough detail, but this could get lengthy. I have a 70 stang with a transplanted 351W. It ran real rough when I got it last fall, and the carb was cruddy, so I bought a rebuild kit and rebuilt it...seemed straight forward, but my first rebuild (it's a stock two-barrel...donor car for motor a 77 LTD). I also replaced the cap and rotor, and thought I had a clear diagram on where the wires all go. I only tried to start it once and got a horrendous BOOM that I thought came from the carb, followed by a little smoke out the carb. Thankfully I hadn't pumped the gas, or it may have caused flames. What next? Do I have a vacuum prob, or is it timing?

 

[hurdlinmasta]

i think your in a wrong forum.

 

[Slapyo]

moving to appropriate forum.

 

[ForceFed70]

Backfired through the carb?

Usually timing.. but could be anything. Check to make sure your firing order is correct.

 

[krash kendall]

I agree - crosswired.