I have had some air conditioning work done on the truck. But the real problem is a little more complex. The truck seems to surge or sputter at certain speeds. If I stay below 40-45 there is no problem. When I hit that magic number the car sputters and surges till I reach a higher speed or reduce speed. I also noticed a similar problem at 50-55. I replaced the compressor, but still need to replace the evaporator. I was wondering if anyone else had similar problems or have heard this before. Thanks any help would be a mind helper.
