just a quick question...probably stupid but just wanted to know. are the crx and hatch back si ecu's (PM6 i think?) all the same? cause i have a crx and was wondering if a hatch ecu would work? i think they use both PM6 ecu's but i just wanted to clarify since i'm not sure. also...are there any differences with the 88 and say a 91 si ecu? i have a 88 hf with a 91 D16A6 motor and i'm using a 88 ecu so maybe i could use a 91 ecu and benifit in some way? like were there any upgrades between the years? i don't think so but i'm not too sure. ok well thanks for the help...

-john

 

pm6 = pm6

it doesn't matter what year or what car its coming from its the same ecu.

 

88 PM6 had shitty fuel curves.
89 had slighly better ones.
90-91 had the best fuel curves.