R32 gtr - occasional 2000rpm idle help !

[SiR_RB]

Hey fellas

i got an issue that just arised last week and it's driving me crazy !

car will cold start and idle fine, hot idle is fine but when I'm driving if I down shift and the rpm is over 2000rpm and then pop in neutral it will stay idling at 2000rpm

sometimes it might fall back down to 1000rpm after 5seconds or so but most of the time it will stay there until I pump the throttle then it will settle to 1000

if the car is idling and I pump the throttle again it will idle at 2000rpm until I give the throttle a quick jab the it will settle

 

im running a hypertune plenum and 90mm throttle body, gave the throttle body a clean afew days ago and did a tps reset still no change

also did a pressure test and seemed good

I noticed driveability issues around the 2000rpm like it surges too

i spoke to hypertune and they said to send them the throttle body to test (incase shaft seals are leaking, it's only 2 years old) and to rebuild if necessary 

 

if anyone has any other ideas I can try that would be great

 

thanks

 

 

 

 

 

 

Edited November 4, 2017 by SiR_RB

[GTSBoy]

What idle control?  What ECU?

[SiR_RB]

Vipec v88 ecu

runs factory aac valve under the plenum

 

i should add I have had this setup for 2 years without an issue

until now

[GTSBoy]

Clean the AAC valve.  Take it off, dismantle it, dose it with carby cleaner and a toothbrush/pipe cleaner.

[SiR_RB]

Good idea 

will give that a go 

[SiR_RB]

Just took It off

doesnt look too bad inside will give it a clean and see how it goes later tonight 

[jmknights93]

On 11/5/2017 at 5:06 PM, SiR_RB said:

Just took It off

doesnt look too bad inside will give it a clean and see how it goes later tonight 

How'd you go?

[SiR_RB]

Gave it a clean and so far so good

[Sub Boy32]

What are your plastic throttle spring retainers like? I had a similar issue and it turned out being the plastic retainers had perished and the springs were binding

edit: scratch that I've just read you are running a single throttle.

Edited November 17, 2017 by Sub Boy32
Was a Muppet and didn't read the OP