Quote Originally Posted by ET!
leaving the station i felt my car was running a little under the weather (really shitty low idle and almost stalled, btw my cars an auto) so i keep going not thinking to much of it untill i was stopped at the lights about 1 day later and it was in drive i had my foot on the brake and the idle just kept getting worse and worse until i decided nuetral would be a good idea so i put it in N and revved it and it was still feeling a little chunky....
It sounds like a small amount of debris or water got into your tank. It happens more than you'd think - especially when the underground tanks are very low or when a tanker is adding fuel (as it stirs around crap that could be in the underground tanks).

I used to work in petrol stations for close to 10 years.