running rough, especially at idle. Have checked all ignition parts, injectors on 1990 Cadillac DeVille

replaced distributor, computer but nothing changed. It runs ok until it heats up (5-10 minutes) and then runs like crap. Anyone know where the fuel injector fuse is located that someone mentioned? It spent 3 weeks in the shop and they found nothing.

2 answers
check for a vaccum leak
SEEK ANOTHER SHOP FOR A 2ND OPINION