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My scanner will not allow me to see the desired pressures only the actual pressure and the code was a P0093. the vehicle was a no start when it came in now after installing the new cp3 pump and filter housing the vehicle starts everytime but still has the extended crank issue and the power issue
Just wanted to let you know what fixed this starting issue. I did some more research and found a quick test to see if the fuel pressure control solenoid was actually bad. Yes the actual rail pressure was alot lower than commanded. You can remove the return line from the solenoid and while cranking should not return any fuel. If it does and you have low pressure the solenoid would then be suspect. Mine was not leaking so I decided to cap off fuel injectors like we do on the 5.9 common rail cummins one at a time and try to start and check pressure. When I got to #4 injector the pressure went up instantly and did not bleed down as fast. The engine started right up and ran after setting over night.. Replaced the bad injector and it started perfectly the next morning at 5 degrees above zero.