subaru ecu/ems, subaru engine electronics Options

[ModPR3]

subie guys need your help again. after finding out that a 911 engine rebuild cost over 8k the subie or v8 path is looking good again. if i ran the 2002-2004 wrx 2.0 turbo motor what do i do about the engine control unit or engine management. can the engine be run with the stock subaru ecu or does it have to be switched out to a standalone unit. if the stock ecu can be used, how hard is it to wire into the 914. thanks.

[TonyAKAVW]

The wiring harness 'conversion' isn't especially hard, it just requires some attention to detail and a really basic understanding of wiring. Basically what you do is find a schematic diagram for the original configuration in a Subaru and then strip away the things you don't need. What you are left with is an ECU and harness that can be put into a 914.

Figuring out what is needed isn't too bad. The manuals for these cars also have sections describing what each item does. For instance a "purge solenoid" is used in emissions controls, and so its something I eliminated. Some items need to be simulated with resistors, such as the fuel tank level sender and fuel pressure sender. Do some research through the three Subaru conversions on this board and see what people ahve done with electronics. There is a fair amount here already on at least the basics of what to do.

In short its doable with a basic knowledge of electronics.

-Tony