Hello!I got a problem.Every cold morning when i start up my sapphire it revs up over 2.5k rpm for more a half minute without my desire and then come to standar idle.
I remove idle air control valve and clean it twice and for one 2 months havent got any problem.But these cold days problem came back again!
Help anyone?

Btw i buy a new water temp sensor to see if it resolve the problem but i cant find where is located!

(sapphire cosworth 4x4 92')

 

check your TPS,and clean all engine plugs with contact cleaner!also check your throttle body with the cable!

 

CTS is at the back of head on the inlet side, it's a little tricky to get to.

It's either a bad ISCV or the valve is being told to operate in this way, i.e. bad input from TPS.

Martin

 

also unplug the ISCV when the car is cold and see what happen,the revs still up?