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Hello, do you have a scan tool that can monitor data?
A snap on solus will be very helpful. A scan tool will allow you to see the icp pressure. The engine needs 500icp pressure in order to fire the injectors. If you had a manual gauge for hydraulics you to test high pressure oil as well. You can also open the fuel drain and see if diesel drains on the ground.
This fuel system should purge itself after cycling the keys a couple times. The icp sensor is on the driver cylinder head in the front. If you remove the icp and plug in the tester you will want a gauge that goes to about 2000psi
Correct, if you build above 500psi then the oil system isn't going to be the problem.