Engine/Transmission (1998.5 - 2002) OEM fuel pressure adjustment?

[ukmuk]

Hello,



Can fuel pressure be adjusted on the 2nd gen OEM fuel lift pump? I’ve heard that the 1st gen CTD’s are adjustable.



I ask because over many months I have noticed a slight loss in power. I should probably replace the fuel filter first. Last did it 10K miles ago.



What I really need to do is install the FP, boost, and EGT gauges. For now, I’ll have to check pressure with a manual gauge on the post-filter port (before and after filter change and under load) to see what it’s telling me.



As far as the lift pump, should it replaced as a preventive measure (and if so, when), or do most people just wait until they fail before replacing?



If I find that I have low fuel pressure, are the only possible causes a clogged filter, pump that is about to fail, etc? Or are there other possibilities?



Thanks for your comments/suggestions.



Matthew

 

[rkressg]

Not to my knowledge. The stock design lift pump has an operation range of around 16psi (though in reality these numbers tend to be significantly lower). I would strongly suggest purchasing a MECHANICAL fuel pressure gauge (ISSPRO makes a good gauge). The diesel fuel destroy the electrical fuel sending units.



I would just go and buy an additional lift pump; they are just not reliable.



The best solution is to buy an alternative fuel transfer solution such as a FASS or a RASP. I personally like the FASS and the FASS-2, they are much easier to install than a RASP and peform just as well (IMHO) for almost all applications except the most extreme.

-Rich