hi all, nuttin to major but my frst is bein a lil bitch... shes spot on when shes first started n driven, soon as we get ta temperature after drivin 20 mins/half hour ish, she trys stallin when were comin to a stop plus her revs are NOT dropping straight down when changing gear? there stayin high,,,, any suggestions would b much appreciated. im thinkin maybe idol control valve but just a stab in dark....

 

could be the icv but usually when they stick the revs stay a bit high, mine was fault on my fiesta, when I disconnected the valve the revs went to around 600rpm and practically stalled, bought another valve of ebay, that was faulty too so if it is your valve buy from some one with confidence as i paid 80 for a buggered one :-(

 

mine stays high wen changing gear n also drops to bout 600rpm wen i come to a stop once she's warm. ebays dodgy dude, i bought a chip shoulda bin a 195 but never sin lol ended up contactin msd and payin 255 but was well worth it. so u2 are thinkin icv?

 

possibly but im being honest here, i dont really know. What happens when you unplug it? has it seized?

 

to b honest m8, ive not unplugged it. ill do that tomorrow. it drives spot on tho other than what ive said. 1st thing in mornin when its cold, she's fine

 

either iscv or coolant temp sensor isn't playing ball.

 

The ISCV is only used when cold as there is a richer mixture or when theres a heavy electrical load, unplugging when up to temp will have no effect at all. As said defo sounds like the CTS this controls the base level of fuel injected from the map right from freezing up to boiling. When faulty they cause the problems you describe.

The fact that your revs stay high show the ISCV is working.

Martin

 

Don't know about on thr rst, but some iscv control the full range of idle right down to zero.
If it were mine I would check the co when hot is ok, then junk the iscv and add ifnecessary a stop on the throttle linkage somewhere to set a idle speed = end of worries, if mapped nicely/correctly after a few seconds will idle on it's own from stone cold.
Mapped a saxo friday no iscv on that one, idles from stone cold 100% perfectly, aftermarket ecu emerlad K3.
My cossie idles perfect from cold, at 950 unless I want a faster idle such as when warming car in winter then switch to different warm up map(switch) idle cold is either 1500rpm or on other 3rd map 1900rpm
tabetha