hey guys! Im new here, and new to the cummins world,  so please bare with me!

 

I recently picked up a 2002 ram 3500 dually, 6 speed. 

There are absolutely no modifications the the truck except a brand new raptor frrp 100 gph lift pump,  and a brand new thoroughbred diesel injection pump.

 

My problem before was, i started up, warmed up, and left the house,  made it about 10 minutes down the road before i started bucking and misfiring,  come to find out i had lost all fuel pressure and got the amazing code of p0216.

 

I went ahead and replaced both the lift pump and injection pump, checked voltages on the plugs, checked the numbers on the iat, checked the numbers on the map sensor,  and everything  checked out, i checked grounds, batterys, everythings fine.

 

After i replaced the lift pump and injection pump, i drove around for about 3 hours with idle pressure at 20( set from factory) and driving/ wot around 13-15. After driving for 3ish hours, it started bucking and skipping on me again like a misfire, and my fuel pressure was perfect at idle, but completely zero in any type of driving .

In neutral,  if i rev for about 5 seconds, it as well drops completely to zero.

 

I checked the pump by removing the line and running it to a 5 gallon bucket, it moved quite a bit of fuel just bumping the starter. The pump itself has no inline screens , so i know its not clogged.

The fuel filter was changed a few days prior to the new pumps with the Baldwin pf7977. It starts up on a dime everytime,  and currently has no codes on the key trick, or a scanner.

 

Any ideas on where to go next?? Im stumpped and just lost.

 

A recap- when i drive, my fuel pressure goes from ( i adjusted the regulator a few days ago per thoroughbred diesel tech instructions) 17psi straight down to zero as i slightly increase rpm.

 

Im sorry for such a long post and thank you in advance for reading my Short novel! Thanks guys!

Edited July 6, 20204 yr by Jacob_harley

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.

 

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! 

set the pressure higher. idle you want over 14.

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

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.