Extremely High Idle, Rb20det

[GT_APEX]

hey everyone, got a massive idle problem, my car is idleing at nearly 2000rpm!!!!!, we have established that it is not aac valve, i am 99% sure there is no vacuum leaks either. when the car was auto it had the problem and now that it is manual it is still there and much more noticable. it is now manual but still has a auto ecu. any suggestions would be great as at this stage i am stumped. i was thinking it could be throttle position sensor????.

Thanks for any help!

Adam Dare

[GT_APEX]

like i said any help would be great.

[locky]

like i said any help would be great.

HI have you disconnected the other air bypass which operates during cold starting it is located to the left of the throttle body near the rear injectors

[Nathan_G1]

^^^^^ that could be the problem........also, check your alternator it may be on its way out

could also be the throttle positioning sensor.......may have been knocked about or is also busted

[RellikZephyr]

check the position of your throttle buttefly

i had the same prob a while ago idle at 1800

problem tracked down to 2 small vacuum leaks and the butteflies were slightly open (but mine GTR so 6 slightly open was letting a fair whack of air in)

i cleaned my intake and with gunk gone, thats what left small gaps between butteflies, cleaned yours recently?? (upper engine cleaner)

Cheers

RellikZephyr

[samdumbert]

Im having the exact same problem. Ive tried cleaning the butterfly, it didnt help.

Its weird because it doesnt hunt at all, just its too high.

[RellikZephyr]

no no when i had the problem it occured because i cleaned the butterflies

check that your butterfly is fully closed on idle

RellikZephyr

[blind_elk]

My money is on the TPS not sending a "throttle closed" signal to the ECU. Should be 0 ohms across pins 1,2 (or 2,3 - can never remember the combo lol).

[jantolis]

My money is on the TPS not sending a "throttle closed" signal to the ECU. Should be 0 ohms across pins 1,2 (or 2,3 - can never remember the combo lol).

I've been told that my high idle problem was the throttle position sensor. How do you fix it or how much is a new one????