i hav an 2004 ex coupe,i was wondering if a p28 computer is compatible w/ my car?

 

It is my understanding that with an obd conversion you could use a p28 retuned... how complicated it is I have no clue

 

You would need to make an entire conversion sub-harness for it, and load a D17-compatible base map, meaning it would have to be modified to handle custom base maps. The amount of time and money it will take won't be worth anything unless you're running serious boost, and don't like using K-pro, since K-pro is a cheaper (smarter) option now, because they make K-pro for D17 ECU's.

 

A P28 disables all OBD-II functions, so if you live in a place with emissions checking, you're SOL.

Plus, as was said it'll be some work to make it work. Not worth the effort.