Mitsubishi GTO Twin Turbo Diagnosis

[blackout1]

Ive got a 97 GTO twin turbo which is running rich.

It revs quite high on idle and pops and bangs, it also fowls its plugs.

Some details of the car: 15G Turbos,fidanza alloy flywheel, 3" stainless pipe to the back, alloy under drive pulley.

ECU numbers:
MD190627
E2T35689
2Z17
T

MAF Sensor Numbers:
165
1921 A
E5T05072

The car wont run unless a direct 12v + from the battery is fed to the fuel pump. As soon as thats removed it dies.

Ive checked for vacuum leaks, its got a new fuel pump, new fuel filter. I've swapped the injectors over and swapped MAF sensors all to some avail as the car wasn't even able to run when I first got it. I've put a new power transistor unit into it but now the rev gauge is erratic haha.

Out of ideas and I dont own an oscilloscope which is a shame

 

[motomattx]

Its no good, give it to me.

 

[motomattx]

Coolant temp sensor possibly for rich condition, boost leak test it also, and sounds like there are multiple electrical issues, the fuel pump relay should be energized by the ecu after the ecu see's a crank signal.

 

[pat white]

I always like to check fuel pressure at the rail to rule out regulator or return issues.