Engine/Transmission (1998.5 - 2002) Erratic Fuel Pressure

[JTitone]

Last summer I installed a Fass DDRP into my 98. 5. Until recently fuel pressure with the new LP has been a steady 16 lbs at idle and 10 @WOT. Within the last week I'm noticing fuel pressure readings between 19 and 20 lbs at idle, while WOT and steady driving @2200 rpm have stayed consistent. Anyone else experience this type of jump in idle fuel pressure? Should this increase in pressure at idle be a concern?



Jim T

1998. 5 2500, SLT, 2WD, Ext Cab, Long Bed, MBRP Exhaust, Isspro Fuel Pressure, Fass DDRP LP, Linux Bed

 

[DSlover]

JTitone

I just put a FASS DDRP-02 pump on my 98. 5 3500 yesterday, I havn't had time to try it out yet but it idels at 19#

Dslover

 

[DSlover]

JTitone

I just put a FASS DDRP-02 pump on my 98. 5 3500 yesterday, I havn't had time to try it out yet but it idle's at 19#

Dslover

 

[RCrosby]

its been close to a year since i installed my ddrp on the frame near tank, no problem 15-16 psi. stock truck. I still have a walbro-392 pump near the ddrp fass for a backup. back when i installed the walbro, i had to put a 16 psi relief valve after pump. I just kept the relief valve on. and you got the relief on the injecter pump also. at times i may see 17 psi. rcrosby