Hi i have a faily low run time 770 avenger carb, the carb is about 3 yrs old, but has low run time.. the problem is with the idle.. it sux and is very rough.. I am not familur with problem solving this carb.. what should i look for, so far the float level is ok, the choke is ok.. the fuel psi is about 3-4 lbs.

I can adjust the mix screws with little afect..

the plugs look blk..

is there anyone here i can send it to


here are the specs

SB 410 stroker

9.6 cr
ported 587 heads with 2.02 valved
comp cam XE274 230/236@488/491 lift with matching springs.
rpm airgap intake.

msd E-curve dist
hooker headers.
904 auto
355 gears
street driven