totally stumped

[mautzi]

replaced, both cats, 4 02 sensors, still had cutting fuel/throttle at various rpm and not moving or shifting, couldn't get uphill, car would rev but no power, no changing of gears (had tranny recently rebuilt, took back to shop, they say gears shift perfectly couldn't reproduce my problem). drove the car a few days and sure enough the same symptoms, car is moving, hit the gas rpms get to 4500, no gear shift no additional power then get SES light. REad codes get P0172 and P0174. Read the forums folks say mostly likely MAF, just replaced the MAF took for a spin and the same thing just happened. I didn't push it the SES point yet, but I can reproduce. Any other thoughts or ideas? I'm gonna try fuel system cleaner, then maybe fuel filter but man I am stumped.

thanks