Okay so I recently purchased my third mighty max...a 1990 mighty max 2.4 auto trans. Was told truck originally stopped running said he had to feather the gas to make it go. Truck is getting fuel to motor and is in time. Swapped dizzy with one of my others...I reset dizzy today and it ran for like 4 seconds. Just spitting and sputtering. Now truck does nothing but turn over and back fires like a hit and miss engine but will not run. Any clues? Any and all help will be greatly appreciated! Maybe fuel injectors clogged? Ecm has also supposed to be new.. thanks in advance