Ok - spent a few hours on this issue today. I've replaced every hose on the engine at this point and cleaned out the ALDA connection from the intake manifold.

I've connected a T to the line going to the ALDA and under heavy load (peddle to the floor while driving) I peg my pressure gauge at 10 PSI. It hit the max peg hard enough that I'm pretty sure it's getting 12-14 PSI.

I've timed the Injection pump - no change.

I've replaced the fuel return lines from the IP - no change.

I've replaced both the fuel filters - no change.

I've replaced the fuel return banjo bolt on the engine side of the IP - no change.

I've swapped out the wastegate following the pressure wastegate swap that many here have done - no change.

I've checked for full motion of the throttle linkage when someone pushes the peddle to the floor - looks good.

I've connected a small fuel container and used that for testing to see if the fuel supply was the issue - no change.

I have a identical '92 300D and it is FAST compared to this one.

Other than replacing the IP or the turbo - what else can I try? Engine starts with NO issues and there is no smoke of any kind - even under load.

I'm pretty certain it's a fuel source issue - yes?

Thanks,

-John