My wife was driving it when i was deployed and said she thought it was going to stall on her so when i got home i took it apart and changed the plugs, wires, etc, then it ran great except for the surging and an on and off CEL which i pulled the codes for o2 sensor and EGR valve. I replaced the plenum gasket and now no CEL but the occasional surge at 1750 RPM.If it could possibly be a vacumm leak from the plenum or throttle body i am more than willing to take it apart and replace the gaskets again. I am getting pretty good at it and can tear it all apart in less than 15 minutes now. I just dont want to spend the time and money if thats not it.