Idle problem also ?

[Big Al]

Whilst sitting at traffic lights without touching the throttle the engine revs fluctuate from below 500rpm to about 2,000rpm ?

Doers anyone have any ideas ?

Cheers

Big Al http://www.mkivsupra.co.uk/iB_html/non-cgi/emoticons/help.gif

[Martin F]

Its normally a dirty ISC valve, or it could be an air leak. However i'd try cleaning the ISCV first and see if it cures it.

There has been a couple of threads on here recently concerning the ISC with a couple of pics.

[Big Al]

What's an ISVC ?

[Martin F]

Here's one of the other threads with a link to some of the pics http://www.mkivsupra.co.uk/cgi-bin....hl=idle (http://www.mkivsupra.co.uk/cgi-bin/iB/ikonboard.cgi?act=ST;f=1;t=464;hl=idle)

ISCV = Idle Speed Control Valve

Hope that helps