~ Two Things ~

80's 90's TBI from any of the manufacturers is/was crapp at best and Chrysler's certainly have/had a well deserved reputation for being as crappy as any. I spent more than a few years chasing problems with mine. Not mentioning all the little things I tried, I replaced the actual injectors several times and finally replaced the entire computer to get it running somewhat acceptable although not perfect, and I still don't trust it.
Next step for me will be a fuel pressure reducer and a thermoquad (not quadrajet, although one of the Mopar factory supplied ones would work too) setup from one of the last carbureted trucks, because I don't want to spend the time and money converting an old work truck to port injection. Don't have a clue if they would let you smog it that way in SoCal though, even if it passed the sniffer.