I know this question has been asked b4 but don't find what I'm looking for. I have a 97 f150 with no motor. At all!!! Came across an 01 donor grand marquis with everything to car. Well I already swapped out motor and tranny to car into truck my question is the wiring. I have truck harness with pcm and also car harness with pcm. Ppl say swap intake manifold exhaust manifold ect ect but I have none of those parts from truck. Any help would be appreciated.

 

My first thought would be ,It shouldn't be done, but there are probably emission components in the marquis that are not in the 150. These very possibly could affect performance. There are monitors that need to run and be confirmed functioning before something near good performance can be obtained . The first challenge will be to get it started and go from there. I hesitate to suggest it can't be done, but they said the bee should not be able to fly the way it is built ! Electronics have a way of messing up your whole day and they just may get into your day too.!

 

I agree first thing would be to start truck and that's what I need help with. Do I use truck harness and pcm or do I need car harness and pcm. I was think of just using car harness with pcm to try to star then work from there but really don't have a clue which route to go with. I seen one guy said use truck harness and pcm but idk how that would work due to truck harness has coil packs and car cop.

 

This is the beginning of a messed up day, you definitely cannot mix the components and have it work.
Among the things that could be causing the problem might be the anti-theft systems.
When you start changing PCMs (powertrain control modules) the system will not recognize the other components and among the problems comes the "no start) problem.
Things get screwed up and a capable scan tool is required to unscrew the problem,,,,maybe!! This gets more involved than we have time to cover here. Maybe someone else here can shed more light on attempting to perform this type of swapping.