I am starting to look in to fuel management options for when I get all the parts for my hmt kit. I currently have a 1991 Civic hb D15 which had a carb setup, but was swapped out for Dpfi.......No I didn't do it lol I bought it like that, but what can you expect for $500 bucks. My question is how can I find out what ecu I have.

 

the ecu should have a code on it right? (i'm pretty sure you checked because that is very obvious but i had to ask)

 

take a pic of the side of the ecu that has text and well read it for you. lol.
most likely you have a pm5 or pm9