[Conner0388]

I’m having the code p1516 which is throttle actuator control (tac) module throttle actuator position performance. I’m being tuned by GPI and the they don’t know the issue. I have a 95mm throttle body on. It ran fine while I was on 93 then when I switched to e85 the code came up and the car would run badly. They gave me 3 other tunes to try out to fix the issue me none of them worked. I blew out the connections, checked the connections, made sure wires were tight on the harness. They having me switch back to my oem lt1 throttle body. I started it up and it was idling very rough and stalling itself out. Sent them over a log so they can get my car drivable with the oem throttle body. Does anybody know why the 95mm throttle body is having that issue. Could it just be a bad throttle body which doesn’t make sense because it ran fine on 93? Could the ecm be fried?