alexjohn

Since none of the messages on the opengarages page use "Byte 0", Im assuming they are naming the first byte "Byte 1", whereas we call it byte 0.  They say engine speed is in Byte 1/2, but the CANdo example has data in byte 1,2, 4, 7 & 8, so there maybe something else beside engine speed that is needed.
They also do not say which is the high byte, and what bit rate is used, so you'll have to make a few assumptions.  I would start with a bit rate of 500K.
Set up like this and see if anything happens:


 

That TPS singal looks better but you still need to run a re-calibration as the first 10-20% of the pedal travel isnt being registered, but that isn't why its stopping at 1500rpm.
spark, fuel, afr all look normal.  Does it backfire/stutter/etc at 1500 or does it just sound like you're only holding your foot down 20%?
It still looks like a mechnical blockage somewhere. If you disconnect the intake piping at the manifold can you rev it higher? This will rule out blocked filter etc.
Can you spin the turbo by hand? if it were seized you could be blocking up both the intake and exhaust side which would do something like this.
Are your cams intalled properly? either cam being off by a couple teeth (or adjusted too far if they can adjusted) could show up like this.
The only ecu-ish thing I can see that might be relevant is that you still have your MAF hooked up, but its calibration is all wrong and the ECU thinks its a fuel pressure sensor! you dont have it configured to use this pressure in the fuelling calculations, so it shouldnt be relevant but its a bit strange. It also only ever shows "pressure" on overrun when you jump off the throttle. This was the same as your last log too. This could be your recirc valve opening and dumping boost, but you shouldnt have any boost there to vent as it never breaks 100kpa at open throttle. I'm not exactly sure what this means the fault is but if it were me i'd look into this a bit and see where it leads.