R32 Rb20Det (Idle Problem)

[nes 1871]

Hi peeps, I recently bought my first Skyline with some damage to the drivers corner. Panel work is done (: so i started looking at the engine. I started the car and the idle was rough with it idleing high and low very quickly I noticed that one of the injectors where leaking so I pulled them out got my injector guy to have a look at them and he found two to be faulty and need replaced. I got 2 injectors and serviced them and wacked them back in. Started the car it has fixed the rough idle car still seam's to be a little out on idle but rev meter says 900rpm and it idles high and low???? Has anyone had this issue help would be very much appreciated. Thanks guys

I have gone over my hose's with carby cleaner, Blocked my BOV (put a plate over the gasket) and checked my wastgate (not seized)

[nes 1871]

also guys I have not cleaned my Iac or ACC but will clean them tomorrow. The car is R32 gtst rb20det turbo r33 turbo, Hybrid intercooler, it has a mines ecu in it not sure if it is original and a apex pod filter

[mad082]

Given that the iac and aac are the biggest cause of idle problems, there's a pretty good chance cleaning then will solve your problem

[nes 1871]

Thanks mate I'll let u know how i go

[nes 1871]

I removed the ACC and cleanded the buid up (there was abit of oil or carbon) still has a bad idle (reving up and down)

I tryed to locate the IAC but couldnt find it but with some help from a helpfull message that was sent from a SAU user (thanks again for the info)

I turned my attention to the air regulator I blocked it started the car and it is still has a bad idle

[nes 1871]

Im looking at focusing my attention on the AFM and TPS and do abit of research

[Kane_R32]

What happens if you disconnect the IAC valve with the car running? Does the car idle at a set rpm then?

[nes 1871]

ok guys bit of a mix up by me. Instead of taking off the ACC and cleaning the spring and screw i pulled off the ACC solinode. I just cleaned it and put it back together thanks to DIY search and I then begun to set the idle screw. I disconnected the ACC plug and I found myself closing the screw all the way down to get to 900rpm i open it abit and now im getting 950rpm but car gets to 1200rpm even 1500 sometimes. this happens when i give it abit of throttle car dosnt react when i brake or turn the stearing wheel.

[nes 1871]

I disconnected a blue plug that i think is the IAC valve and it dose idle the same just plays up after i give throttle

[nes 1871]

ok guys this is where I am today. I went over the intercooler hoses and clamps, cleaned my AFM, cleaned the BOV, cleaned the ACC (spring and screw), cleaned the IAC valve and cleaned the throttle body. after doing all this started the car and same result (idle floats between) 900 and 1200rpm.

I also remembered that a SUA user mentioned the injector seal on the manifold I found that number 1 injector is leaking from the top part of the injector. I removed it and swiched the seals with number 2 and number one still leaked. My injector guy will receive a very happy call tomorrow. I have tryed to set my idle screw (ACC) but cant get a good idle I think due to the injector leaking.

oh I also pumped the brakes continues and the idle went down pretty fast??? I think the booster has a vac leak causing this idle???

[StevenCJR31]

The injector leaking shouldnt make a difference to its idle, it certainly didnt cause any idle issues with mine