can you run a 2wd sapph without the iscv plugged in, im certain mine is knackerd ive cleand it twice wich made a difference but when in traffic now and again it takes it upon itself to rev up top about 3000 rpm and drop down again, when i unplug it it idles lower and smoother.

 

it will run

id just get another one tho

i know there costly for what it is but its better than it annoying you

i got mine from woodfords for my previous cossie

 

I think u can run them without the valve they r about 100 quid for a new valve.

 

Cant beleive the price they are , ive ben talkin to another lad i met and he runs his ok wi out one, he said its just a bit of a git when cold. I will sorce one tho aswell as an abs sensor. Thats a rite price combined.

 

Abs sensors are about another 100 quid. Silly money for a bit of wire with a magnet on the end.hee hee

 

most iscv problems are due to a incorrectly set up tps. when the ecu sees the thottle is open even the smalllest ammount the iscv opens.

if it happens some times and not others maybe the throttle isnt always closing to the same position?

also air leaks are a critical factoe in adjusting idle speed..Make sure you havnt got any!

 

for your abs sensor try paul @ ny spares or pete @ rs spares they will be able to sell you one for not silly money provided they have some good ones in that is i got one from pete for about Ł40 if i remember correctly and it was mint.

 

Ill give em a try, ive emaild rapid ford as he is breaking one and just waiting for the reply

 

Most ISCV play up because of the shit design as well.
It will do no harm providing it rests closed and not open, just unplug it, as said idle will be a bit lumpy when cold etc, it will just remind you of dodgy choke carby days!!
tabetha

 

You might get troubles with the engine "hunting" upon idle/tickover. It might even stall every once in a while. I'd get it fixed. I am not sure but maybe the ISCV on the 2.0i DOHC (8v) Sierra is the same? Plenty of those available I'd say.

I was just thinkling, AFAIK the ISCV hardly ever really breaks. Is the hose connected properly? Maybe it's split? Or the gasket on the ISCV wasn't sealing properly?

 

The iscv on the sierra 2.0 dohc is totaly different 2 the cossies i used 2 own a sierra with the 2.0 dohc engine