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Does anyone have a similar machine they could check the fuel pressure and see if what pressure it has? Does anyone know what the recommended fuel pressure should be? I cant find it anywhere.

Did you replace with OEM or just an aftermarket separator?

If I am understanding correctly, the dealer is the only one that diagnose with the Diagmaster, correct?

I agree with the firing of the parts cannon. That’s why I picked it up. I can’t afford the dealership guessing at $180 and hour and parts changing at $250+ a part. I check the fuel pressure between the fuel filter and the supply pump. Should be swing the pressure the 12v pump is producing. DPF...

It was the one labeled 010 in the picture. It was identified and provided by the dealership when they had it.

I did not reprogram the ecu. Do you have a recommendation for a programmer or is this gonna be a dealership process?

I just bought one and have been going through it. I haven’t see anything that has really addressed the issue.

Some additional history; it has always had this fuel pressure since I got it. Then a few weeks ago it went into regen mode and wouldn’t come out of it. Then it started giving a system engine error code 22 (exhaust inlet sensor). The code would reset if the key was turned off and back on. I...

Yes, it seems to run just fine.

I’m using a harbor freight fuel pressure gauge connected to the air bleeder on the filter. I’m getting the same results downstream of the fuel filter just before it enters the injector pump. See attached pics.

Yes sir, you are correct, there are a ton of connections. I have changed several of these and seem to have the air issue resolve. Now I just can't figure out why I have so much vacuum on the suction side of the injector pump and so much fuel bypassing back to the tank.

I recently purchased a 2017 KX040-4. The fuel system was getting air in it an shutting down when running at high idle. I isolated the issue to the water separator bowl and got it fixed. I also noticed that the fuel pressure is negative 10-20 psi at full throttle and 0 - negative 5 psi at lower...