Anybody know how to sort out issues with idle speed as my car is reving up to 6000 on start up. 1992 saph cossie.

 

have you tried cleaning out or replacing idle control valve?

 

check throttles not sticking

check for air leaks

can you get it on a monitor/diagnostic equip?

 

Throttle not sticking. no air leaks sprayed some stuff and it did nothing. ISCV Is clean and the iner part moves freely, Disconected the ISCV and this brought revs down to 2500 which got me home. Tried reconnecting and it shot back up to red line. Dissconected TPS and this made no difference also. Car was starting abit iffy before this happened last night but only for 2 seconds and then it calmed down to around 1100rpm but know it is riddiculous.

 

by disconecting then reconecting highlights a iscv problem-no??

 

No, the fact the revs are changing when connected and disconnected shows the valve is being TOLD to do so.

Even when D/C though the revs are still at 2K+ so I would say the valve has got stuck a little, I would take out and clean and re lube using a light lubricant such as WD40 or brake fluid etc, make sure it is not open slightly.

As to why it's doing it I would check the ISCV has not got earthed, chaffed wiring etc.

Martin