i have a 6.0 with 243 heads, texas speed torque V2 cam, ls1 intake and 12554271 injectors, aftermarket throttle body. I think it's a 95 m.m. I'm usung a mosule with 12212156 OS. I can not get it to idle. i have to hole throttle about 1/8 way to let it idle. i checked checked throttle body on a scanner, it seems ok. any help on where i should start to make changes would be appriciated. or if there are any tutorials.

thanks