Fuel Rail PRV leaking...is it supposed too??

[cerberusiam]

6. b. Operate the engine at idle and actuate the high pressure safety valve test with the scan tool. Watch for fuel flow into the fuel container.

Is the pressure for this test listed, or, have you seen what it is during the test?

 

[Bob4x4]

Same as disconnecting the fca iirc.

 

[JJPage]

Where can one purchase the Miller 9013? This tool/fitting must block off the return flow and only allow fuel from PRV/PLV? If so, this would be much quicker and cleaner than zip tying a plastic bag around the return line, and then watching fuel spray out of the valve...



Thanks sag2, very good info!

 

[Bob4x4]

SPX Miller Special Tools Search Results for 9013

 

[sag2]

Is the pressure for this test listed, or, have you seen what it is during the test?

Actually it is a little less than max pressure, and the controller does not let it spike the pressure like disconnecting the FCA does. But the early service info had you disconnect the FCA before they added the routine to the scan tool. What they found was repeated (about 50) max pressure via disconnecting the FCA was taking out a good valve, like in all the training center trucks!

 

[cerberusiam]

What they found was repeated (about 50) max pressure via disconnecting the FCA was taking out a good valve, like in all the training center trucks!

Woops! Nothing like a little real world testing to show cause for modification of the test procedures. :-laf:-laf



Sounds like the scan tool ramps it slowly to around 22-23k psi to give an adequate test but not spike it and hurt the PRV.



Guess disconnecting the FCA to test it is not a really good idea either. May break something else in the process.

 

[TCDiesel]

Sag2. . I enjoy reading your Post. TRD Kings paste and copy this . . Alright remove PRV take to Hydraulic specialty company Have them test for failure. We have tested way beyond any know company... At Idle when RUNNING even Modded Pumps cannot pop the 30/32K valve... Now shut the truck off with FCA unplug and capped you will see spikes beyond 50K. You TDR kings added to My Bank account today... Thank You. My Bank Acount love's Ya.

 

[sag2]

Woops! Nothing like a little real world testing to show cause for modification of the test procedures. :-laf:-laf



Sounds like the scan tool ramps it slowly to around 22-23k psi to give an adequate test but not spike it and hurt the PRV.



Guess disconnecting the FCA to test it is not a really good idea either. May break something else in the process.

If you don't have a scan tool, disconnecting the FCA is still an acceptable option as long as you use common sense and don't do it many times as noted above.

 

[TSPowell]

Well I actually had a Miller 9013 tool that I forgot about so I installed that and fired the truck up. The valve is leaking but only about one drop every 5 seconds, not sure if this warrants replacement? Im going to order the 9012 and see what my return flow from the head and CP3 is now.

 

[cerberusiam]

The valve is leaking but only about one drop every 5 seconds,

Was that with the FCA connected or disconnected? Did it change when the rail pressure was high?



Per the test description, the PRV is bad. However, how much of an effect it has on starting and running is the question.



The problem with the valves is once they start leaking they will only get worse. The longer the pressure is allowed to bypass like that the more it etches the seat and the more it leaks.

 

[TSPowell]

That was with the FCA connected. I think the rail pressure was around 6,400. Im assuming if I disconnect the FCA the pressure will be high enough to open the PRV? I didn't have a hose connected, but Im going to go buy one right now.

 

[TCDiesel]

Was that with the FCA connected or disconnected? Did it change when the rail pressure was high?



Per the test description, the PRV is bad. However, how much of an effect it has on starting and running is the question.



The problem with the valves is once they start leaking they will only get worse. The longer the pressure is allowed to bypass like that the more it etches the seat and the more it leaks.

X2... Eventaully the Needle will break off. . If you purchase from Us , all cores with Broken Needle are worthless and NOT rebuild-able. The core Charge will be applied $100. 00 or by new form Cummins around $225. 00 Factory Bosch.

 

[TCDiesel]

Does anybody at the TDR know what the compression rate of the Factory Spring (PRV)? and how many LBS does it take to compress to factory Rates? If You do not Know these 2 basic spec's,Your knowledge is equal Paste and Copy From Relentless Diesel website.