I can give whatever info might be needed if I can get some help, I have a 91 n/a s5 fc, I bought it with my dad and we had a machine shop in michigan called chips machine all the irons and housing’s, also got the rotar balanced and bought a rebuild kit from atkins where it had all the apex seals and others. we finally got it back together and removed lots of the random rats nest then when we fired it up it started but wouldn’t stay idle at all, then we put the rats nest stuff back in such as the omp and others. still not luck with idle. what do i need to do, really need help with this one.

 

Check your compression, spark and fuel delivery.
After that verify timing and vacuum routing.