Cosworth Cutting out when cold!!
 

Hi Guy's,

I've got a problem with my car. When i start it from cold it will hunt (rev up and down) and then cut out unless i drive it for 1-2 minutes and then its fine.

I've cleaned the ISCV and checked its getting power and all seems well.

Any ideas??:top:

I have the same problem, and it's always done it, which is annoying.

I think the valve is faulty, but it's hard to find the original ones and unless new, it's likely to have the same issue.

A few years ago, I got an aftermarket one, but this was worse than the original, as it run too fast, I figured the springs were not of the correct specification, but even messing around with them, it still would not work right and so I put the original back on.

Martin

Can anyone shed any more light on this?

Is the idle 100% stable once warm? does it dip at all? If so then the main throttle body butterfly wants opening a touch to support the base idle speed with a touch more air.

Mine's exactly the same. won't idle at all when cold, but after a minute with my foot on the throttle keeping it at about 700 - 1000 rpm, it's fine, if still a little lumpy. Once fully warm though, it idles perfectly.

Do not adjust the throttle stop screw the base idle is adjusted via the idle by pass air bleed screw

Can't you get them new from GGR?

Thats what i meant. Yes do not adjust the butterfly it will put your tps out. ta Tone :clap:

i bought an after market icv recently it works fine but my old one did all but stop. there is a procedure for setting the idle its not just moving the butterfly

my car does the oppsite.

starts up fine for a few minutes then starts to hunt then when really warm it's fine again

si