when i start my car from cold it ticks over like a pile of shite, as if some one is revin it up, ive changed the idle controle valve with no joy, ive changed the blue water temp sns an still the same allthow it was a spare used sensor i tried. when it has warmed up it ticks over fine drives fine its just on cold start!!! can any one help?????

 

I have had this with mine ever since I had the car, in my case I am sure it's the ISCV, I did try another Ebay job which stopped the hunting but it idled way to fast, it's to do with the incorrect spring rating and you have to sod about changing them around etc with the ones from the other valve.

In your case, I suggest you look toward your TPS, check the output!

Also is your base idle set correctly?

I assume it's the Escos in your siggy?

Martin

 

If you unplug the iscv are there any changes in the idleing?

 

Reset base idle, Co too lean, tps fault?

 

yes mate it is the escos in my sig but its home built and runs 2wd runnin gear so l6 ecu. it was fine all lastyear an now just started to play up. if i unplug the idle controle valve it ticks over sweet. wot is the iscv lol

 

it is the idle speed control valve

Idle is ok even when the engine is cold?

 

if i unplug the iscv it runns fine when pluged back in its crap againe, i have tried another valve i had spair an that was the same????

 

You have just answered your question !

clean it easy as !

 

I thought the ISCV is the Idle Speed Compensation Valve NOT control

 

If you tried 2 valves and both where the same I guess the iscv is OK and some sensor is giving the iscv the wrong signals.

 

The official name is CONTROL valve, however some people like Stu from MSD etc prefer to call it compensation as that's what it's really doing, i.e. giving air compensation over the base idle in the Cosworth's case, whatever the name, IACV etc it's the same component to all intents and purposes.

To the OP now we know that, did you swap the loom/TPS? I suspect you haven't or you have the correct TPS, but haven't changed the loom or modified the existing one by inverting the two TPS wires.

Can you answer YES to BOTH the above questions? If not this will be your problem and the car won't run right period.

The fact when you unplug the ISCV and the revs ease show the valve to be doing it's job!

Martin