Starting new thread with updates and everything compiled.

Background:
Car ran great for over a year, averaged 21-22mpg.
Last Sept water pump blew and the car was running at 110C for a few days while I tried to diagnose what was happening, never overheated though.

MPG dropped to 12-13avg and power SUCKS. I would guess a 50% drop in power. Its just lifeless.

Parts Replaced / Tests done

• Plugs/Wires/Rotor/Cap <--- done last year brand new
• Compression Test GOOD -- average 180psi all cylinders, variance no greater than 5%
• New fuel pumps, fuel filter, fuel tank strainer, fuel tank inspected, all fuel hoses replaced
• Fuel Distributor + EHA brand new
• O2 sensor new
• Injectors are brand new + also checked spray pattern
• Coil swapped with spare
• Car goes into closed-loop. Duty cycle 55% and fluctuating
• Fuel pumps now gets 1L in 30secs (spec is 1L in 40secs)
• Fuel Pressures are 5.1/5.5 bar -- pressure holds @ 3.1bar. So pressures + holding pressure GOOD.
  

Ideas where to look now?

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2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
2014 Jeep Wranger Unlimited Sahara - 62k
2003 Gray Mercedes ML350 - 122k