Intermittent problem

Just recently - and only it seems when it's wet (although as it is wet most of the time that might be a coincidence) - the Ulysse (97 2.0S) stalls when slowing to a halt. It's happened a couple of times now and apart from a couple of low rev grumbles and a sort of hesitancy is running fine. Idle is good and hot or cold it starts fine. Is this a fuel supply issue? Should I perhaps wait until the plugs and leads are changed next week when it gets its full service? Any thoughts?

I'm a member on several car forums (fora? )

And this is bit slow by comparison. So....

BUMP chaps!

Well now the fault has occurred more frequently. I can't drive it around now as it keeps stalling. I've had it serviced, and now I think I have to go down the route of checking/cleaning distributor cap, throttle body, idle control valve and so on. I'll check battery earth, fuse box and I would get someone to plug in a reader (if I knew someone who had one) although having spoken to a couple of people the fact the orange warning light doesn't come on is encouraging.

Any handy tips anyone?