2004 Aveo LS with 201,000 miles has sudden jerk, (misfire). Thought at first tranny was going out, but does it at stop light. Not continuous, as my daily round trip drive is 104 miles. (work). Probably 3-4 times is all. Most of the misfire is while engine is under a load such as driving up a hill. At first I thought my fuel pump was going out so I replaced it. Worth the effort as I didn't want to be stranded at the side of the road, and as I mentioned it has over 200,000 miles. Bought it when it had only 50,000 miles back in 2012. Plugs changed a year ago. So someone mentioned to replace the fuel damper, and I've looked at both ends of the fuel rail, and I'll be damn if I can locate it. I mean I assume that's where it would be mounted. Any help will be greatly appreciated.