I have a stage 2 G reg Sapphire, i ticks over high at abot 11-1200 rpm, i have cleaned the idle speed control valve & if i un plug it the engine cuts out so i dont think its the isc valve, i have turned the screw on the bottom of the throttle body (the one with a 14mm lock nut) but this doesnt alter the idle speed, what else could it be? also somimes the idle is aratic when i pull up at junctions surging up & down

please help

CheeRs Gav

 

Alos forgot to mention that the car idles very high when started from cold, well over 1500rpm

cheeRS Gav

 

TPS, well that's what was wrong with mine.

 

hello mate
have you cleaned out the throttle body as well?
mine had a similar prob.
took the throttle body off and cleaned it out in thinners. put it back and reset the base idle and its been alright since.
might be worth a try.
are you the gav that knows matt messe?
cheers nick

 

you need to set the base idle and go from there then when you plug the iscv in if the idle changes then something is telling the ecu to lift the rpm could be tps or temp sensor hope this helps where in notts are you

 

Cheers for all the advice everyone! nick, do you mean matt that works for merc? Alan im in Heanor

CheeRS Gav

 

yes mate.
he was the guy that give me your number about that s/s zorst you sold a couple of years back.