'Lumpy' startup once warm

[M4tty69]

Hi all.

Have an annoying problem with the rocco once its warm...

I start the car in the morning absolutely fine, little bit of choke and she fires up on the button, runs well whilst driving ect ect.
if i then switch off the engine once warm, she turns over for a very long time and then coughs and splutters into life for about 10 seconds then runs perfectly again.

I know shes running a little rich which im going to be sorting soon but is there anything else that people have known to cause this kind of problem?

Cheers guys and girls

Edit: Sorry forgot to say its a 1991 GT2 1.8 8v

[james butler]

that sounds like running rich allright.
basically everytime you try to start it up your almost flooding it before it starts.
a choked airfilter can cause this aswell.

[M4tty69]

Just got round to getting it on the emissions tester and it was running at 0.246 % CO so it was really weak :/ Got the CO to 1.024% which is well within tolerance (1% +.5) and she seems to start up perfectly for now and also hasnt had the idling hissy fit i sometimes get once warm!

Fingers crossed it was just too weak and the non start when warm could have been fuel evaporation? and the idling could have been fuel starvation....

[M4tty69]

Nope... didnt cure it :(

that said, the cars a lot more responsive now! goes like stink, but still has the intermittant idle problem :(