 1995 Windstar Problem
So I've been working on this 1995 Ford Windstar, 3.8L that's been working like crap. Someone brought it in for an engine change because they thought the engine was bad. I replaced the engine and it still acts the same. the symptoms are, it backfires through the intake, the back exhaust manifold gets cherry red, it runs like hell mis-firing all the time. I've tried another ECM, coil, bunch of electronic stuff on the engine off another good working van and it still does the same stuff. Anyone have any idea what might be the problem? I unhooked the exhaust thinking a cat may be plugged up and contributing to the problem, but that didn't make any difference at all. | 
