I have been having this problem for a few months now: after I get gas at the station my 07' Outlook XR has trouble starting, I have to hold the key in the start position for about 5 seconds after it turns over it rumbles a bit and after a few seconds it's running like a charm. The check engine light is on and I was told that i needed to have my Gas cap replaced (That has been done with no avail) We are planing on taking a trip to Houston (About a 200 mile drive) and I don't feel real comfortable driving a car with a problem related to the fuel system. Please Help!