Ok m8 sound like a supid answer but this is whot happened to mine it would'nt start after it had be running fine ect it started when i towed it the it would'nt do a think it had to much fuel going to 2 cyls so i canged the metering unit and it fired then cut out and would'nt start

so i removed the boost hose going to the turbo and it was full of fuel so emped it then put it back together and it fired up fine but then did the same thing so im now on my 3rd metering unit and so far its ok apart from snapping a injector hose

So just pull the boost hose off going to the turbo just in case its droping the fuel into the hose it only did in under pressure on mine

Good luck m8