i'm not sure what happened but i just went and tried to start it and it started right up. i drove it a couple times after that and the check engine light never came on. i was able to check the codes with a tech 1 and it said it was an egr problem. i don't remember what the code # was. what would cause it to run one time but then just not. i was driving today and i had the rmps up close to 5 and then the check engine light came on and is now on every time the car get up to temp. so would being at a higher rpm make the egr valve stick and then maybe it finally got stuck all the way open and wouldn't start and after sitting for a while finally came unstuck? is the egr valve bad and should i buy a new one, if so where could i find a used or good priced one b/c all i've found are ones for $150-$200.