I know your post is a months old. My wifes accord was doing the samething. I changed the fuel filter and that seened to help. My wifes care also has serging problems and the tach goes crazy after it get up to temp.Have you figures out anything in the last few month? I talked to a few guys that come through our shop and they say its the main relay under the dash under the steering wheel.I haven't tryed that yet because i need to check it out.I just cant throw parts at something.I replace all important parts with factory stuff

My truck spun a bearing so we are down to one car,i ride my motorcycle but that is really starting to suck.