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Old 03-14-2009, 06:05 PM   #2
Scooby Guru
Member#: 5218
Join Date: Mar 2001
Chapter/Region: MWSOC
Location: SAUL'S Motorsports
96L Most Over-
Developed Beater


What year is the EJ25? I'm guessing it's a SOHC phase II? If so, you have a hard road ahead to get the IAC right. The 98 used a 3 wire solenoid with a simple IACO(open), IACC(closed) and ground wire. The other types on newer IAC's aren't that simple. Even the 3 wire IAC from a 99 EJ22 is proving to be incompatable with the older ECU.

Changing up to a newer EJ25 ECU will pretty much include a complete harness merge. The 98RS ECU should be a plug and play affair if you wanted to go that route.....

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