Rough warm up?

[Ebme Geek]

i tried the choke and it just cut out straight away

What I find with mine is it will fire up without choke absolutely fine, but as I put the choke on to hold an idle while it warms it will die unless I give it some teasing on the throttle, couple of gentle blips norm does it and aim straight tor 3/4 of the choke, then it will sit there warming up fine and I can back the choke off by the time I get out of the drive.

Strange how it dies as the choke is applied, I will have to see if I can find details of the choke circuit, It's fine going off the choke slowly.