fizzyturbo

i haveing some unusual idleing on my rs turbo, sometimes when stationary the idle will gently rise up and down between 1000rpm and 1400rpm ? and sometines i will pull up at traffic lights and it will idle around 2000 then just drop down to 1000?

can anyone help cus im a bit baffled

reisskahn

Hi ive got similar problems too. When i start the car in the morning or from cold it idles at around 2000 revs and then after about 5mins drops down to about 900-1000 revs. It stays at that during the day but sometimes does pop back up for a bit then back down to about 900-1000 revs.

1.) What should the car be initially be idleing at when you first start it?

2.) If 2000 revs is way high what can the problem be???

sammy

Try cleaning the ISCV (idle speed control valve) & throttle body with some carb cleaner, refit parts & allow engine to reach norm operating temp. Disconect ISCV plug & set base idle to approx 725rpm (grub screw lower of throttle body) reconect plug & leave to idle for 15 mins (ecu to relearn new values). If this dont work try disconecting the speed sensor wires (3 pin plug) between the speedo cable & g/box, if all is well replace sensor.
reisskahn, yours sounds like it MAY just need to be left idling for 15 mins, have you disconected the battery lately?

reisskahn

hi erm dont remember disconnecting the battery lately and if i did what will happen anyway regaring the revs?

And what do you mean by i need to leave it idleing for 15 minutes, do u mean when i start it or soming???

Lou Lou.

also check your co level cos that was making my car idle badly

BRAMMER

iTrader: (23)

Got the same problem but i know my tps needs relacing and the co pot This was mentioned the last time it was on the rollers.

But will try some of sammys suggestions.

Is "sammy" a guy ??? If not she knows her stuff

Chris.