Alright havent been on here in a while cause i sold my 04 but, i recently bought 2 foxes 89&90 5.0's. Here my problem, my 89 has idle surging problems. Some times it jumps up and holds high for a few then dies real low. and sometimes it sounds like it has a real nasty cam in it and the whole care shakes. Heres what i've done... cheked and adjusted tps, cleaned maf,replaced iac, checked for vacuum leaks, pulled code(none present),timing is ok. When cruising it had a "stumble" to it but i assume it was from the tps being outta adjustment. also when i unplug iac and or maf nothing happens what so ever.anyone think i have a faulty ecm maybe? sorry for the long post wanted to give all the details.