i dont think the lexus afm and 550cc injectors are direct plug and play that might be your problem

Why wouldnt it be?

i heard of people having trouble with it, theres something you adjust or something i dont quite remember, somebody correct me if im wrong

whats the timing set at? and the more you build your car, the less its gonna wanna idle smooth

i disagree with that statement

"99 times out of 100, the weak link in the MKIII is the owner."
-Mike Donahue

Now would i have to buy a Lexus IATS since it is an MAF from a lexus, the TPS sensor is calibrated right we checked it like three times.

that wasn't aimed at mkiii supras specifically.. and if you build it, advance the timing and run the right a/f its gonna wanna idle like at 1200, below that it idles like shit cuz the timing

Assuming the Lexus AFM is the same style as the one from a supra. You would have to buy the whole AFM since the IAT sensor is in the same housing as the AFM. The afm and IATS are integrated into one.

The TPS and the IATS chek out fine, any other ideas?

Then check your wiring, your not getting those codes out of no where.