I've got a 90' with manual trans. I had to replace alot of sensors to get it running properly. replaced MAP, TPS, and ECU. all came out of 94' fwd. I was told by a sub dealer that the 94' stuff is the current replacement for anything predating. Mine runs great now. if you need info about wiring colors or what not I might be able to help. mine is 4wd if that matters at all.