5.9L 24V Mechanical Fuel Pressure Gauge
 

Another newbie question............

I just purchased a 98 2500 24V 5.9L short bed ram 2wd. Has bout 222,000 on it and I'm tryin to get an idea what kinda shape my lift pump and fuel system in general are in. I'm probably gonna replace the lift pump just to be safe but I'd like to find out what my baseline pressures are.

Some folks have suggested using a mechanical pressure gauge in one of the 1/8" ports on top of the stock filter canister for a quickie estimate of fuel pressure. The pix I have seen show a guage not unlike the pressure gauge atop my swimming pool filter with a 1/8" NIP fitting coming out of the bottom of the gauge.(Turbo Diesel Register ) I fully intend to put in a dash mounted electric fuel pressure gauge in the near future but thought I'd use this mechanical gauge right now just to see what my pressures are. My question is......... Can this be any kind of pressure gauge? Will a water pressure gauge or an air pressure gauge 0-30 PSI work?

Link to the pictures

Any help would be appreciated.

Thanx,

Dave :s:

If it is a quick test, you could get away with it. The air in the line/hose you will use to connect the two will act as a buffer between the diesel and gauge it's self. I don't suggest leaving it in place though.
Not to sure about everyone else, but I can't see the picture. Best place to measure fuel pressure is at the VP44 inlet. Using one of these works really well,
BANJO BOLT - TAPPED ('98.5-'09, 5.9L & 6.7L)-Dodge Cummins Diesel Truck Accessories – Geno’s Garage

I got mine from AutoZone. I THINK it came with plastic tube to connect it with. If not I think I used the kit for connecting a boost gauge that had the prior mentioned parts.
I can't remember witch.

it was stupid cheap though.

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Thanx for the quick reply, RAWilliams. Sorry about the pix, I re-posted the link to the pix. :argh:

It shows a direct connect to the filter head via a 1/8" fitting sans hose.

Do you know what type of gauge would work? Is any 0-30 PSI pressure gauge suitable? ( i.e. water, air or fuel )or does it have to specifically be a fuel pressure guage? Does it matter to the gauge what is making the pressure? The guy at NAPA looked at me like I had three heads........... Does liquid filled vs dry matter?
I'm gonna order a dash mounted fuel pressure guage and the banjo bolt you suggested for the final install.





Turbo Diesel Register Tech: Fuel Transfer Pumps Revisited

Thanx,

Supa

Any oil or fuel pressure gauge would work. I use gauges like these for all my hydraulic and fuel pressure testing. You don't need liquid filled, but they are nice to have. I do a lot of testing, so I buy the good ones. A dry gauge, 0-30psi shouldn't run you more then $20 to $30. I'd go to industrial supply shops before NAPA for a gauge, they are more familiar with that type of thing. The other thing you will need is a way to connect your gauge to your test port. Most gauges, or at least the one's I get, have a male 1/4" NPT on them.

Got it.

Gonna get one today and test.

Thanx again, RA.

Supa

you have the right idea if the lift pump is still stock replace it before you have to replace the injection pump. $600 now it's better than $2k later for a lift and injection pump.

Finally Pressure read
 

Woo=hoo

15-16 lbs at innermost test port on filter canister at idle. Ran it up to about 2500 rpm, wont go below 14psi. Lift pump looks like it was replaced fairly recently. Still planning on replacing lift pump just to be sure............

Have some questions about my fuel pump module if anyone has the time.......

Do you think I could find a test gauge for cheap at autozone here in MO? if so can you list all the fittings and hose I would need??? BTW i have an air dog 100 the stock one/ canister is gone... Thanks

Note that the gauge is ghetto as hell and small but it works in a pinch. You can also justify the line because you use the 1/8th fitting until you buy a overpriced AutoMeter or similar gauge then the AN line screws right to it without the fitting

Im using this gauge = AutoZone #59013

http://contentinfo.autozone.com/znet...59013/image/4/

Also this line kit = Autozone #640720

http://contentinfo.autozone.com/znet...40720/image/4/