I have an 08 ram 3500 with the 6.7. Truck started stalling when hot. Hooked up scanner to find high pressure fuel dropping off. Found relief valve was leaking off. Installed rail plug and still drops off hot. Checked lift pump pressure, got 10psi dropping no lower than 7 after long pulls. Swapped fuel filter and FCA. Still stalls. Replaced cp3. Still stalls. Finally got mad and performed return test. Came back at 300ml in 30 seconds. Replaced all 6 injectors. Truck is Still stalling. Cold will maybe build to 18-20000 psi, and continually drops until it stalls. Anyone have any ideas before I burn this thing?