2nd Gen Non-Engine/Transmission Diesel Dan got a guestion

[Cummins5390]

hey dan i put my new fass pump on. . same as the other 1 idles at like 18 drops to around 8... changed the fuel filters what should i do now?? i checked with a different guage same results... let me know thanks

 

[Highfinance97]

When does it drop to 8 psi?? At WOT??



Michael

 

[Cummins5390]

yup but i have seen it hit 7

 

[Highfinance97]

DPP makes a 1/2 Suction Tube Kit part # STK-1001 That bypasses the 1/4 factory fuel line that your currently trying to suck through



I installed one on my 99 and it helped out a lot.





Michael

 

[Highfinance97]

opps i just noticed you have a draw straw



Now im stumped



Is your line free from getting pinched inbetween anything??



when i took my fass off of my 97 i noticed that it was pnched inbetween the frame and fuel tank, so i had good PSI at idle but not at WOT



Michael

 

[LowFly]

https://www.turbodieselregister.com...mission-discussions/185944-fuel-pressure.html

 

[Silver_Ram]

Dan,



My fuel pressure is around 14 to 15 psi @ idle, but lately I have noticed that my full throttle pressure drops to 8 psi. Before June 2007, I couldn't get the wide open pressure to ever drop below 12 psi.



I have an HPFP that was installed last fall, I have changed both filters, I just had my Juice Module updated recently & tried the new fuel pressure sender that came back with it. The fuel pressures remain the same. The temperatures around Utah have been alot hotter than normal, & I am wondering if maybe the heat is causing the drop. I don't know if diesel can get really thin at the higher temperatures?

 

[LowFly]

Dan,



My fuel pressure is around 14 to 15 psi @ idle, but lately I have noticed that my full throttle pressure drops to 8 psi. Before June 2007, I couldn't get the wide open pressure to ever drop below 12 psi.



I have an HPFP that was installed last fall, I have changed both filters, I just had my Juice Module updated recently & tried the new fuel pressure sender that came back with it. The fuel pressures remain the same. The temperatures around Utah have been alot hotter than normal, & I am wondering if maybe the heat is causing the drop. I don't know if diesel can get really thin at the higher temperatures?

Defiantly double check that Juice with monitor with a mechanical gauge. I had a few guys double check theirs and found to read about 5-7PSI low under WOT. This would be the first place I would check.



For other suggestions... . click on the link above that i posted.....

 

[RSimmons]

I have the same issue with mine (95/150). It did not do it when new and new filters made no difference. The pump is also very quiet so I don't suspect any inlet restriction. When new, it would not move off about 16 PSI... . now it fluctuates with throttle load. I am reading pressure with a westach gauge and have read on the pressure port on the FASS as well as the inlet to the VP44. I have never noticed pressure ranges from 22 to about 10 PSI.



I also seem to have priming issues as well. From the initial install, I cannot get the pump to prime unless I pre-fill the filters.

 

[Cummins5390]

dan have you recieved my pump yet??any ideas on what i need to do??

 

[LowFly]

dan have you recieved my pump yet??any ideas on what i need to do??

I have not got it back yet... . but UPS hasnt hit yet today..... only suggestions i got at the moment i posted on the other thread (See post #15) ... ... until i recieve your pump back here... ...

 

[Cummins5390]

ok so if i get the Mr. Gasket Barb Fuel Pressure Gauge Fitting what are the reading i need to be seeing will they be the same as my others or higher or lower?

 

[LowFly]

ok so if i get the Mr. Gasket Barb Fuel Pressure Gauge Fitting what are the reading i need to be seeing will they be the same as my others or higher or lower?

you should see what our pumps dead head at. We set them up for 16-18 PSI on our bench. As for WOT... most tell me about a 2 PSI drop under normal full working conditions. Im not saying that fitting will fix your issue. BUT it will give you an ideal unrestricted, full flow access port to monitor fuel pressure.

 

[Cummins5390]

ok i ordered it today... i put it after the pump correct??? thanks

 

[LowFly]

ok i ordered it today... i put it after the pump correct??? thanks

HPFP -- I would put it between the IP and final filter... ... . do you have the upgraded 3/8's line kit Eric has between the filter and IP?



If you had the FASS, anywhere in the line.

 

[Cummins5390]

i dont think so... and sorry but what the ip??? i am a little losted

 

[LowFly]

i dont think so... and sorry but what the ip??? i am a little losted

IP = Injection Pump...

 

[Cummins5390]

o ok thanks

 

[Cummins5390]

DAN have you recieved my pump yet??? hope so. . it hasnt been a good weekend my electric fuel pressure guage the sensor thing quit working and i tried to put my mechanical 1 in and i got every thing hooked up but i cant seem to get all the air out of it or something so i am gonna try to get a new thing from auto meter i am keeping both guages hook up is this ok since 1 is that jegs part and the other is in the injection pump?? let me know thanks

 

[Cummins5390]

?????? ????