So i had my 96 npi motor rebuilt and bored 20 over. Pi swapped heads with comp cams stage 1 cams. Ford performance rockers and trick flow lifters. Screaming demon coils and ford perf bigger wires as well as platinum plugs. Bbk cold air intake and pi intake manifold. McLeod stg 3 ceramic puck clutch and ford perf lightend flywheel. The car will run at higher rpm just fine but idling is very erratic after some time idling and if I press in the clutch after about 10 mins the car shuts off. I replaced the VSS and the iac is the one I had just replaced before the build started. The build started 2 years ago and it runs and drives today. I'm suspecting an iac issue or tps. Any input would be awesome.