I drove my X all the way from Pennsylvania down to North Carolina for FFO and it drove flawlessly, averaging 35mpg at 75mph. Ran consistently 190 degrees except when I would let off the gas quickly it would run 225 degrees for 5 to 8 seconds then drop quickly back to 190 degrees. I pounded the car hard during some of the events at FFo and it never overheated. It has a newly rebuilt high compression engine correctly timed, completely cleaned out cooling system, recored extra efficiency radiator, new thermostat. Per Matt's recommendation, I bled the cooling system but it still did it on the return trip. Any ideas?
Dave
Dave