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ECU questions????
Posted: Sat Feb 23, 2008 5:08 am
by the_watts10
1994 ej22t swap on a 1991 legacy wagon. ok i have everything mechanical that is needed (i think ) well anyway i was wondering that if the ecu off of the NA wagon will work if not will my 1994 ej22t ECU plug right in?
Posted: Sat Feb 23, 2008 5:36 am
by PhyrraM
Your stock ECU will plug in and be able to run the engine, but not very well and the general concensus seems to be to run the Ej22t ECU. Some have run the factory non-turbo ECU with piggybacks, but I can't comment on thier success.
The Ej22t ecu can be plugged into the cars harness provided you do 3 things.
1. Swap the cam and crank position sensor pins at the ecu connector. This is detailed in a few other posts. Basically, grab the pin-out diagrams for both from here on LC and make your harness match the Ej22t one.
2. Add in the boost sensor and boost control wiring. Once again, make your harness match a factory Ej22t.
3. Use your factory non-turbo intake manifold harness on the Ej22t engine. This saves a ton of work re-pinning those connectors to match each other electrically.
Posted: Sat Feb 23, 2008 4:27 pm
by Legacy777
You can just swap the positive pins for the crank & cam sensors.