Keeping IP alive w/stock lift pump

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Re: Keeping IP alive w/stock lift pump

Postby RCCUMMINS89 » Tue Jun 07, 2016 10:09 pm

I'm telling you.........with a mechanical gauge leave air in the line......it won't bounce at all. With an electronic gauge, you have to use a needle valve. Snubbers suck from my experience and don't do snot.
89 RC on shortened 92 diesel frame - NV4500 w/dual disc/4.10s on 37s. - Self built pump, "hot screw", lots of timing, True high volume low pressure lift pump, 62fmw/68/.7gated, 77lpm SAC Inj., Studs/O-rings,- 423/1220 Mustang - 11/16/2013 http://www.TheHungryDiesel.com full line dealer, if you don't see it please ask.
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Re: Keeping IP alive w/stock lift pump

Postby spencerdiesel » Sat Jun 11, 2016 8:47 am

I went to install the banjo, needle valve, gauge etc last night. Everything was going ok......then I lost one of the compression sleeves :| Not having another on hand, I was going to just close the needle valve all the way and see if it held.

I gave the piston pump a push or two (didn't even turn the motor over) and fuel started coming out of the outlet side of the needle valve....at a fast drip. I had the fuel line loosely attached at the needle valve (just hadn't bothered to remove it as i didn't think the needle valve would leak when closed), and the line securely fastened on the gauge side. Fuel dribbled out of the gauge side to........at literally atmospheric pressure.

I used the thread sealant per permatex, and snugged ( 4 or 5 ft lbs) all the fittings. Anyone have a gander as to what I did wrong?

The needle valve is one of the cheaper ones....
1992 W250, 5 speed, 4.10, Ext. cab Ext. bed, 12.5k winch, 75 gal. fuel tank

H1C/18

Fuel: THD 12 psi piston pump, THD fuel pin, 366 spring, fuel screw bottomed @ 3 turns, timing bumped 3/16"
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spencerdiesel
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Re: Keeping IP alive w/stock lift pump

Postby spencerdiesel » Sat Jun 11, 2016 11:15 am

Any suggestions?
1992 W250, 5 speed, 4.10, Ext. cab Ext. bed, 12.5k winch, 75 gal. fuel tank

H1C/18

Fuel: THD 12 psi piston pump, THD fuel pin, 366 spring, fuel screw bottomed @ 3 turns, timing bumped 3/16"
Muffler delete
spencerdiesel
14mm rotor
 
Posts: 1039
Joined: Tue Oct 27, 2015 4:02 pm
Location: Brevard, NC
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Re: Keeping IP alive w/stock lift pump

Postby DMan1198 » Sat Jun 11, 2016 11:49 am

I would suggest not losing compression fittings. It won't seal at all without one regardless of how tight you go.
Ducati- professional nap taker, and thread derailer extraordinaire
Brownie: 80 dodge heavy half. Ghost cummins under the hood, and some sinister plans
The Roo Hunter: 93 w250, lifted, 2 whistle machines, and a bunch of other go fast goodies, uhh..... not there yet
Jaeger: 12 ram 3500. Lifted, exhausted, and fed an excessive quantity of air
The Huntress: 02 Jetta TDI. No muffler, egr, horsepower
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Re: Keeping IP alive w/stock lift pump

Postby spencerdiesel » Sat Jun 11, 2016 1:45 pm

Sorry I wasn't real clear. The needle valve was passing fuel even when it was fully closed. I only had the line sitting in the outlet of the needle valve because the needle valve was closed, so I didn't think any fuel would come from the valve outlet.

The low/no pressure dribble that made it out of the needle valve and into the line easily leaked out of the gauge-end fitting. The gauge side's compression ring was still intact and present.
1992 W250, 5 speed, 4.10, Ext. cab Ext. bed, 12.5k winch, 75 gal. fuel tank

H1C/18

Fuel: THD 12 psi piston pump, THD fuel pin, 366 spring, fuel screw bottomed @ 3 turns, timing bumped 3/16"
Muffler delete
spencerdiesel
14mm rotor
 
Posts: 1039
Joined: Tue Oct 27, 2015 4:02 pm
Location: Brevard, NC
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Re: Keeping IP alive w/stock lift pump

Postby DMan1198 » Sat Jun 11, 2016 5:51 pm

Admittedly I was teasing you. Is it possible that needle valve just doesn't ever fully close?
Ducati- professional nap taker, and thread derailer extraordinaire
Brownie: 80 dodge heavy half. Ghost cummins under the hood, and some sinister plans
The Roo Hunter: 93 w250, lifted, 2 whistle machines, and a bunch of other go fast goodies, uhh..... not there yet
Jaeger: 12 ram 3500. Lifted, exhausted, and fed an excessive quantity of air
The Huntress: 02 Jetta TDI. No muffler, egr, horsepower
DMan1198
14mm rotor
 
Posts: 2177
Joined: Sat Aug 10, 2013 6:26 am
Location: Slave Lake, Alberta
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Re: Keeping IP alive w/stock lift pump

Postby spencerdiesel » Sat Jun 11, 2016 8:02 pm

Your good brah :D It very well could be, it was a $3 special....

So then, I'll be finding a good ole Napa valve
1992 W250, 5 speed, 4.10, Ext. cab Ext. bed, 12.5k winch, 75 gal. fuel tank

H1C/18

Fuel: THD 12 psi piston pump, THD fuel pin, 366 spring, fuel screw bottomed @ 3 turns, timing bumped 3/16"
Muffler delete
spencerdiesel
14mm rotor
 
Posts: 1039
Joined: Tue Oct 27, 2015 4:02 pm
Location: Brevard, NC
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