High Idle when put in Drive or reverse? No surging.

[D-rock615]

I'm having a idle problem. The idle is fine when the car is in P or N, but when I put it in R or D the idle goes up to 1500 and stays there. When it is in P or N it sits perfectly around 800 no surging or anything. In D or R, the engine is pulling against the brakes which is annoying. I should ad this a mostly stock 91 SE with a CAI. I did have a surging issue before, after warming up and then putting it into P it would surge. But that is gone now.

[EsperHamid]

- IACV / FITV cleaning
- fix ignition timing ... not base idle !!

[D-rock615]

I just got done cleaning the IACV out with carb & throttle cleaner real good. I also decided to bypass the FITV while I was at it, I just removed the coolant lines to the FITV and have the coolant going through the IACV. I wasnt sure if I should've left the coolant off of the IACV. Now the idle still revs up to 1300 to 1500 rpm when it is put into gear. And then when I put it back into Park it surges up and down. It wasn't surgeing before. Do you guys think the coolant needs to be bled now? And if so, how should I do that? I don't want to buy coolant if I don't have to. My radiator is full.

[D-rock615]

UPDATE. I bled the coolant and I still have the same problem. I'm thinking about takeing the coolant off of the IACV also. any other ideas.

[D-rock615]

bump

[D-rock615]

Problem fixed. Just wanted to give an update. Don"t cap the "air boost valve". I capped it off, because it was just sitting there not hooked up to anything since I got the CAI. Well that caused the idle problem, when I removed the cap and let it breath, no more idle problem.