[NocturN]

i had identical problem, took it to three mechanix and they coulddnt figure out what it was. Took it to the dealer and the factory certified techs determined that it needed a new distributor. took it back to my mechanic and told him to change out the distributor. problem fixed. btw, your authorized dealership service place is real good at diagnosing the problems, they also offer to fix it for a hefty price, which is why i took it back to my mechanic to have it done at a fraction of the dealers cost.