Engine/Transmission (1998.5 - 2002) 01 24v with possible pump issues

[Rogan]

Sticks,

I appreciate your input. As I said, I am getting a FPG for in the truck. I'm not scared of the 5-600$ lift pump deal, and I know that the chances of having to drop 1100-1200$ on an injection pump are high.



I'll dig in to this truck some more, this weekend.

 

[Rogan]

I got a chance to peek at the pusher pump the prev. owner installed. It appears to be a Mr. Gasket #12D green pump. . here's the 'description' i found on the 'net, for this pump:

MICRO ELECTRIC FUEL PUMP-DIESEL



12-volt electric diesel fuel transfer pump is safe for diesel fuel use. Simple 2 wire design, self priming, includes 100 micron in line filter. 4-7psi 35GPH, small universal design allows easy set and installation anywhere. Solid state worry free electronics, 12 volt negative ground systems only. *NOT FOR FUEL INJECTED APPLICATIONS*



Model Number: 12D

this could very well be the reason the pressure drops to zero?



The lift pump is an inline-design, as well, but I forget it's brand/model number. Looks like an autozone/pepboys/advance part, though. white/blue box.

I 'think' it's an AirTex E7153 (that's what it looks like, anyway). . Or a copy of the AirTex.



Here's a pdf on the AirTex E7153: http://www.airtexproducts.com/TSB/TSB-0407-01.pdf

 

[Rogan]

I changed the fuel filter on Tuesday. .

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So today, I decided to drop the tank, and check out the sock filter. . What a freakin clusterfudge!

Apparently, someone with little clue, much imagination, and no money decided to fix something. Let's see if I can explain it. .

They took the feed and return lines from the sender assembly, then siliconed those connections closed (on the assembly. )


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(I was kinda confused with the Walbro label, however, there's no pump in it. It's merely a float assembly. . )


They then drilled and tapped two 3/8" barbed fittings through the tank's top. One was a 'new' return, and the other was a 'new' feed. Inside the tank, they installed a 'feed' hose from the one barb, down to the bottom of the tank, and installed a small filter. You know, the ones that are about 3/4" diameter, metal, a nipple on one end (inlet) and threaded fitting on the other. And yes, they put it in backwards. Not to mention, a total PITA for servicing.

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I took the filter off, as I saw some junk in it. I started taping it out onto a paper towel, and you would not believe the crap that came out of it.


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So, I went to Advance, and dug through the filters until I found one with 3/8" nipples on each end, as well as a couple feet of fuel line, and some fuel injection clamps. $36. 87 total, including a Gatorade and some beef jerky LOL

For the reinstall, I left the hose inside, lay on the bottom.
Moved the pusher pump from inside the framerail (where it was buried behind the tank) to the outside of the framerail. I added the new inline filter to between the tank and pusher pump, then plumbed it all back together, and reinstalled the tank.

Turned the pusher pump on, turned the key on, bumped the starter, and watched the pressure go to 27-28psi. Started the truck, and the pressure stayed around 24-28psi. . YAY!

Drove it around the block and it stayed above 15, even with a few hard pulls through the gears.

I got back home, and left it run for about 5-8 minutes, and the pressure stayed steady at 22-25psi. With it still running, I turned off the pusher pump, and the pressure slowly dropped to about 3psi. Turned it back on, and it came right back up.
I think my 'new' Airtex is crap, and won't pull enough fuel, or the pusher pump is too much restriction when off. I can test that tomorrow, by removing it from the loop, since it's now outside the rail, and accessible.

I can say, though, that this is a dog, compaired to my '96 p-pumped, #10 plated truck LOL Nowhere near as responsive, either.


Afterward, my neighbor across the street (he's got a 98. 5 24V 5speed) was talking to me about the truck, and I mentioned that my lift pump is possibly dead. So he says "I have a new in-tank assembly with pump and all the parts for the retrofit, including the manifold piece that goes in place of the lift pump. It's in the garage somewhere. If you want it, you can have it, as I've no need for it now. "

I'm like "Sure. "

So anyhoo, I'm gonna tag the truck today, and drive it to work on Friday (6 mi. round trip) and see how it acts. Only thing I have concern with now, is the lethargic acceleration. But again, that could be due to driving the p-pump truck with it's super-responsiveness and tons-o-power LOL

 

[SeanM]

You might want to be careful if that pump is actually putting out that much pressure because to much pressure is just as bad as to little. I think the max inlet PSI for the VP-44 is like 20 psi. If you have to much is will rupture the rubber diaphram inside the vp.

 

[Rogan]

Thanks, Sean. I'm keeping an eye on it. I still need to replace the lift pump, this I know.
I'm hoping to get a new one some time this week, if all goes well. .

I'll keep you posted. I definitely want this straightened out ASAP, because this truck needs more power! LOL It's so different than my 12V, and it's got minimal stuff done to it, maybe $350 worth of 'mods'. .

Wished the 24V's were that inexpensive to mod

 

[dkoldno7]

vp44

Thanks TDR members this the best 411(info) I have seen BLUE CHIP DIESEL. thanks dkoldno7

 

[Rogan]

I read this on compD last night. .

you can use any electic fuel pump that is able to supply 35+ psi (Fass, Air Dog, ect. )

Is this for p-pump, vp44, or either?

 

[Sticks]

IIRC 30 PSI was the max for the VP, and not pulsating (constant pressure). I'd call a reputable shop like Central Motive Power in Denver CO (Bosch rebuild center) and find out for sure what the max pressure the VP can handle.

 

[Rogan]

IIRC 30 PSI was the max for the VP, and not pulsating (constant pressure). I'd call a reputable shop like Central Motive Power in Denver CO (Bosch rebuild center) and find out for sure what the max pressure the VP can handle.

Thank you. It seems to sit below that, usually in the mid 20s, for the most part.

 

[CAPTPHIL]

Rogan,
I have been following this since your first post. I should have replied before now,but I suffer from old farts syndrome sometimes. I have over one million miles exp. with 2 2nd gen 24v, a 98 and 2001. The 01 is at 647000mi, it went through a complete out of frame rebuild
at 530000 just up I81 in ANTRIM,PA. . I am very happy with their expertise. The company is Antrim Diesel, web is Antrim Diesel Service, Inc. - Greencastle, PA, Ph# 717-597-7963. They are a Cummins Dealer and experts on High Performance mods. on our truck.
GOOD LUCK CAPTPHIL