demasters

So I'm in the home strech of my build. Finally got it started tonight after the exhaust was finished. Problem I'm having is that if I rev it, or try to idle it up it cuts out. Pops and spudders. Idles fine.

Any Ideas whats wrong?

Heres a list of what I have done. Keep in mind I have never driven this rig. I bought it wrecked and started from there

SAS with a FJ60 front
Gear driven case
marlin adapter

Those are the major mods. I don't have a speed sensor hooked up yet but I don't think that will change it.

Thanks for the help
Bill