Okay, I just bought a great project. This 760 is a 1-owner beauty, but it's got a nasty idle and power problem. Lots of miles (193k) but generally clean and in good shape. I think I've narrowed it down to fuel injectors that need cleaning, but that means decommissioning the car for a bit, so I'd like to make sure I'm on the right track.

Sypmtoms:
Poor idle--misses intermittently (cold or hot), sometimes several times/second, sometimes smooth and then miss every 2-4 seconds
No Power under mid- to full-throttle
It NEVER stalls nor has any issue starting right up

Here's where I am with my diagnosis:

• Compression: 150-150-155-150
  
• Coolant Pressure Test: 12psi for 7 minutes, no change = OK
  
• Swapped ECU = No change in condition
  
• Swapped Radio Suppression Relay = No change
  
• Major service (new Air filter, plugs, wires, oil & filter, cap & rotor) = No change
  
• Tried the Carbon removal technique in FAQ (sucking water, then FI cleaner into the intake) = Helped a bit, idles a bit more smoothly, but still misses and no power.
  
• Turbo pressurizes to just over the pressure mark but not full boost
  
• Turbo intake hoses were replaced (AMM all the way to Intercooler) = No change
  
• Vacuum hoses were replaced and are good/holds vacuum.