Help

sunshine · Post by **sunshine** » Tue Mar 12, 2013 8:48 pm

i have a 1996 subaru impreza originaly an ej20 but changed to an ej25 by the person i bought it off it runs rough and does not idle properly jumping from 500 rpm to 1500 and when it starts it revs up to 3000rpm i am pretty sure it has the ej20 ECU in it and the wiring has been changed as with the two crank sensors is it possible to use the ej20 ecu and having it run properley
THANKS

AlpineRaven · Post by **AlpineRaven** » Wed Mar 13, 2013 9:06 pm

Check the part number on the ECU to confirm to see if its EJ20 or EJ25.
Cheers
AP

Subaman · Post by **Subaman** » Thu Mar 14, 2013 7:21 am

Is this a new problem or has it been doing it since the conversion was done?

Post by **TOONGA** » Thu Mar 14, 2013 8:20 am

You will never get it to run properly on the EJ20 ECU. You need the EJ25 ECU for it to run properly.

TOONGA

RSR 555 · Post by **RSR 555** » Thu Mar 14, 2013 5:42 pm

Or buy an 'piggy-back' system to run the extra fuel and timing