hello i have 94 2.4 l mmm has a bad misfire at idle almost kill the engine when drive hyw speeds truck runs great.
when i first bout the truck had a blown head gasket, milled head valve job done replaced head gasket intake gaskets exhaust gasket
coolant temp sensor. cleaned maf, ohm tested injectors all read 12.5-12.8, removed ecm didnt see no corrosion or blown capacitors. pulled plugs their white in color. I used to own a 93 mmm same motor when you engaauged the ac rpms would pick up on my new 94 that doesnt happen just runs even more rough im thinking its the idle speed motor but would that cause a misfire?. I like my little truck and want to run like my old 93