Replaced lift pump and injection pump, still losing all fuel pressure

[JAG1]

When at idle have someone watch the gauge and turn up the regulator for fuel pressure to 22 psi and then back down to around 7. Do this a few times as it eliminated problems on both my rigs when both got new Raptor 150's that were not behaving correctly. Mike the MoparMan gets the credit for this and solving my F/P issues.

Edited July 8, 2020 by JAG1

[IBMobile]

3 hours ago, 01cummins4ever said:

Maybe some one could chime in with IBmobiles lift pump relay diagram

If the ECM lift pump circuit is ok wire in an electric lift pump this way. 

 

This is what I came up with if the ECM lift pump circuit failed and the the other ECM functions are OK.

 

[Jacob_harley]

Evenin fellers! 

 

Just got back from a 70 mile drive,  and whadya know, it drove perfectly.  Cruising and wot around 10-12psi, idle right now is set at 17

Im going to constantly keep an eye on it though just incase the ecm is acting funny making it cut in and out.

 

Thank you for the diagram ibmobile!! 

 

You guys are an awesome bunch! 

[CUMMINSDIESELPWR]

set the pressure higher. idle you want over 14.

[wil440]

On 7/9/2020 at 7:24 AM, Jacob_harley said:

Evenin fellers! 

 

Just got back from a 70 mile drive,  and whadya know, it drove perfectly.  Cruising and wot around 10-12psi, idle right now is set at 17

Im going to constantly keep an eye on it though just incase the ecm is acting funny making it cut in and out.

 

Thank you for the diagram ibmobile!! 

 

You guys are an awesome bunch! 

I'd be concerned at 10 to 12 psi cruising and wot. I'm around 20 at 1800rpm ish on mechanical Assassin and thats through 2 micron filters

[Mopar1973Man]

Even my AirDog 150 is stable. I've got idle pressure at 17 PSI cruising its maybe 16 PSI, Then WOT is about 15 PSI.