I own s13 ca18det for 1 year or so. It's pretty much stock ca18det with few modifications. I'm planning to swap rb25. But until it's done I need to fix my idle problem. Everything runs fine when engine is cold. RMP range is around 1000-1500 depends on weather, but problem starts when engine gets warmed up. The idle is around 2000-2500 RPM. Even then engine runs fine, normal performance. No problem while driving, but when I stop 2500 RPM is unbearable.
I've tried to disconnect AAC connector and adjust idle, clean up throttle chamber and check air intake. What else should I check?
Looking forward to your reply guys.
