i have a 91 rodeo v6 3.1 2wd auto, that was running great and then it one day it would not start, it cranked but no go. had it towed home and soon as it was off the tow truck it started right up. couple days go by it does it again so i replaced the fuel pump and filter. wouldnt start. went out the next morning tried starting it, fires right up. then shut it off wont start again. replaced the iac now starts but runs ruff. please help

i have replaced plugs and wires 6 months prior