High again, new questions bringing this thread back to the top...

I did replace the fuel filter the other day, and now I have a problem with "walking" idle... sometimes it's normal and suddenly it can go up to 1200-1500 rmp or so... being there for som time... I did a new CO adjustment using the EHA current and it got better, however still wanting to be high from time to time... I have just tried a few times)... When I changed the filter the car was washed as well, might it be a problem realating the new filter (better fuel pressure) or might it be maiost disturbing the engine?
Any ideas anybody ;-)

BTW: I have only cold started the car once since then, and then it started just fine, although the idle was to high....