Installed an msd opti on my 94A a while back and water pump failed. Got a new opti and a nos water pump. Car starts perfectly with the 6al box, msd coil, msd wires, and msd opti. Cars been tuned before, and msd opti allows for timing adjustments. Advanced it 6° and the car really has extra oompfh above 2k. Issue im running into is the idle. It hung around 750-800 before changing distributors. Now it hangs around 900-1100 with the slightest bit of initial lag upon giving throttle. Ive checked for every vacuum leak and ive got nothing. IAC valve is aprox 1yr old. Throttle body was cleaned out well. Every plug is plugged in. Throttle cable is perfectly taught. Ive adjusted the throttle screw top driver side of tb as low as it can go. Ive messed with that second screw in the lower front right of the tb and nothing happens. When i unplug the IAC it idles high at 1500. When i pull a vacuum line especially the brake boost line idle drops to 550 and sounds perfect aside from the vibration. Id like the idle to be in that 500-650 range but let me know if 1. Idle is correct for the amount of advance and everything is fine or 2. Theres a way to manually adjust my idle/iac thatll lower my idle (ive tried everything on this forum to lower idle nothing has done anything) or 3. I have to have the ecu tuned again to account for the added timing and other mods. Thank you all

 

Cleaning the entire throttle body again. Took everything apart will update if that fixes the issue

 

cleaned everything very well, no luck. Still at 900rpm idle