Running rich, stumble/stall after boost

[2ndgendsm-md]

well after posting and searching before I had came to the conclusion I had a boost leak. my car runs rich all the time, and after building boost and shifting, it will drop way down and stall. my throttle body shaft seals and biss o ring were leaking. I fixed that, however, it still does the same thing and runs rich. I did another leak test and... no leaks. Could this be caused by a bad ISC ? Could this happen if the previous owner installed a larger fuel pump and no afpr ? I did a resistance test on the coils of my ISC and it read the 35 ohms on one and 70 on the other, is that bad ? at this point im just frustrated,

 

[Grescht]

Sounds like i have the same problem. Except i can't find any boost leaks but my boost is seeping into my VC. but not throught the PCV valve. and she's running super rich and almost stalling after i rev it. Let me know if you figure something out.

 

[my4ATEurV8]

when my car stumbled after hitting boost it ended up being improper spark blug gap.
check youre gap. should be around .028