I just got my new engine in and it runs great except when I'm driving down the road the car will stutter when I level the throttle off from acceleration to cruise. If I'm on the gas it accelerates fine and if I go to coast and let the engine rev down as the car slows it's fine. It's only in that sweet spot between acceleration and coasting. I replaced O2 sensors today, no change I checked my voltage sweep on the TPS for any dead spots and there was nothing. I slowly tested it from .98 to 5 volts with zero dead spots. For giggles on the way home a little bit ago I unplugged the MAF and the stuttering stopped. Now common sense would tell a lot of people "well it must be the MAF" but no necessarily. When you unplug the MAF the computer goes into limp home mode and probably ignores a few sensors at that point and runs the car from predetermined values for whatever RPM you're running. So, what I'm looking for is ideas. I can't hear any hissing noises all around the motor and the intake so I don't think I have a vacuum leak. And spraying carb cleaner all over my powdercoated intake isn't my first choice as it will eat the coating!