hulltech

some times it starts and runs for 5 minutes or so but it runs very rich. i replaced plugs wires cap and rotor. intake gaskets. fuel pressure regulator. i just tested the fuel pressure and it runs right around 45-50 psi. i am at a complete loss on what to do next. i can't read the codes because the previous owner butchered the wiring i guess. SOS

YoungDiesel

The best way would be to try and get some codes but if you can't it'll just be a bit harder. Have you checked how the intake valves are adjusted? What's your compression at? If its running rich that means there's not enough air with the fuel. I would start there next before I replace anymore stuff.