Today I got some help, it turned out the coil "was leaking", when you turned on the ignition there was a 1 inch spark jumping all around the ignition coil.
Bought a new one, new distributor, rotor, cables.
Everything was in very bad shape, all rusted up. But from the outside you couldn't tell. Still wonder how the inside of cables and distributor got in touch with so much water?
I had the car services by some GM professionals last summer after I bought the car... wierd that they didn't notice any of this, since this can't be new.
I took the car for a testdrive and now I feels like it got 25% more power then it had aslong as it been in my possesion.
This will probably lower my fuel consumption aswell, since that been abit high...