Have 1951 Kaiser, just replaced with rebuilt engine, transmission, new electrical fuel pump and new mechanical fuel pump, rebuilt carbeurator. Starts, idles, and runs cool for as long as you want to let it and going down the road at 40-45 mph, runs and shifts perfect. However, give it a little gas to kick it up to about 50-55, it starts to miss and lose power as if it isn't getting the gas. The carbeurator is not vacuum, car has electric wipers. My mechanic has checked fuel pressure, timing, vacuum advance on the distributor, carbeurator rods, float, everything. Everything checks out perfect. He did say that when the problem starts, the temp gauge goes up, but when he lets up on the speed, the heat goes back to normal and it runs perfect again. Anyone got any ideas
Thanks, John