How many people who have the lurching or surging problems are running less than 91 octane gas? When I picked mine up at the used car dealership, they had filled up with the cheapest gas they could get. After the first day it ran crappy.(surging while idling in gear, missing at speed and under load, check engine light on,ect.). I took it to auto zone and had them hook it up and get the codes. They where all emission related codes.I called the dealer where I bought the car and asked what gas they put in it. They admitted that it was the cheap stuff. I ran it down to 1/8 th of a tank and filled it with 93 octane and added some fuel treatment and now it runs fine.