Still having a prob. with fuel cut. Car ran good for 2 days, then started leaning out after about 1/3 throttle. tried all obvious fixes (vaccuum lines, missing link, hose clamps, etc.) Today replaced FMU diaphram, thought for sure was going to fix, let car down, drove around the block, still same problem. Car is acting like FMU is not hooked up. But it is. Has anyone had this prob? How do I fix this?

what is your base fuel pressure set? do you have a fuel pressure guage in your car? what kind of numbers are you seeing?

400whp or bust.