hey, this is Dan with a modified '88 fox...tried to do the set-idle checklist, but having problems...no chance of sustaining idle with IAC unplugged without lots of throttle...background: Edelbrock RPM perfomer II upper and lower intake, MAF conversion, 24 lb injectors set at 45 psi, 24 lb cal computer and 75 mm MAF meter, 70 mm throttle body, Ford Racing B303 cam, heads were ported and polished w/oversized valves. Vacuum system seems intact. Timing set at 14 degrees. Runs rich as hell at idle (no matter how low I set the fuel PSI) and drives poorly, but has good power at hight RPM, dies real easy taking off from a stop and has a bad idle surge. New non-OEM TPS set at 0.971.