It also sometimes idles roughly when stopping at a stop light. It runs fine the rest of the time.
Ben in Joppa 4/5/2013It could be the catalytic converter building up. Getting gunked up and causing too much back pressure. Could be as simple as a few taps with a hammer to free up debris in cat or res. Or, take it out and drive it like you stole it for a little while and try to burn the carbon build up out of there. Hope that helps.