My high idle problem is still annoying me, at times it can hold as high as 1800rpm with the air con on. Usually the rpm stays at about 1500 with a/c and 1200 without. On a good day the legacy will idle beautifully at 600-800rpm, but thats getting rarer.

 

The motor doesnt show any sign of vacuum leaks, carb cleaner has been splashed about and i cant get an idle change. Knock sensor has been replaced recently but that had no effect on the idle problem.

 

As far as i can tell the PCV system is operating correctly even though i cant recognize a PCV valve or a place where one would be fitted.

 

My biggest hint is that the high idle problem tends to occur after holding a constant rpm for a while. It also occurs much more with a hot engine than cold. Everything seems to point to a faulty IAC valve/motor but i cant find one and cant recognize the system that controls the idle, hence my need for someone who is familier with the EJ series SPFI system to chime in here.

 

Thanks for any help you can give.

Check your throttle cable tension. If it's just barely too tight, it will idle high, and the problem gets worse as the engine warms up.

 

If that's not it, take a look at the IAC and make sure it's not stuck or something.