Volvo 760 GLE -83 PRV-V6 Engine (automatic transmission)

I started to notice a month ago that sometimes when I start the car (more often after recent running) that the car feels jumpy a lot more than it use to do. I feel like its not running on all cylinders. It runs smoothly after i've driven away, but when I stop and start again it might happen again.

And this weekend it refused to start after stopping for a minute. I got out of the car and yelled for a minute. Then got back in and tried once more before killing myself and it just started. Since then it have been somewhat hard to get started. I heard that it could be oil getting into the distributor cap?

Anyhow, when its running it never dies or loses power. Power from the engine feels even and strong. I have not seen where the distributorcap is located because of that damn cooling that is just EVERYWHERE when you try to look.
The sparkplugs are like 6 months old. Oilchange last fall. (+ oil filter).

Any ideas? I've tried to read the FAQ but I thought it wouldn't hurt to ask before I crazy on it tomorrow when the sun rises.

I guess my explaination of the problem is somewhat bad. :)
Any help would be appreciated, I just love this car.

Thanks,
Esa Salminen