Go Back   PowerStrokeArmy > Power Strokes > 94-97 Aftermarket

Reply
 
Thread Tools Display Modes
  #1  
Old 08-09-2018, 04:39 AM
cbuttre835 cbuttre835 is offline
Sergeant
Member's Gallery
 
Join Date: Jun 2011
Posts: 170
Default Super Duty fuel pump / selector valve troubleshooting

Ok. Im running a "baby fuel" system; a Super Duty pump after the factory selector valve, feeding into a spin-on filter. The truck died the other day. I had swapped tanks, the gauge moved, but it died at enough miles for the tank I was on to be empty. Checked the fuel pressure gauge under the hood, it was stuck. Got home and when I removed the gauge to put on a new one, the system had trapped air.

Fuel pump is only delivering air. It is running.

Selector valve does nothing, and now the gauge wont move either. #6 fuse (it, and tge a/c comp clutch) is good. Also, when I swapped tanks initially, the level went wayyyyy past full. Kind of weird.

Questions:

If I have good flow thru the selector valve, should I be able to start a siphon or use a suction pump to get fuel out and onto the ground (lower point for siphoning)?

If this SD pump is good, should I be able to put the pickup tube into a bucket of fuel and it pump some? Or does it need to be "primed"?

If I ditch the selector valve - Can the stock OBS tanks be sumped easily, like with a Bean's Diesel Sump?

Can a plastic 38 gallon Bronco tank be sumped? (asking these 2 questions because the sump needs about 4"x4" Ive read.)
__________________
But the conflict here is not between faith and science; it is between the competing faiths of theism and materialism, neither of which can claim to be proved by science. Modern physics has accelerated smack into the limits of the scientific method. It raises questions it cannot answer but that human beings cannot avoid -- matters of meaning and purpose. This is not a failure of science, just a recognition that measurement is not the only source of meaning.

Last edited by cbuttre835; 08-09-2018 at 04:42 AM.
  #2  
Old 08-09-2018, 06:51 AM
ghohouston's Avatar
ghohouston ghohouston is offline
Colonel
Member's Gallery
 
Join Date: Dec 2012
Location: Lewisville,Texas
Posts: 3,754
Default

My selector valve failed between positions. Had the same setup. Got rid of it, and installed a sd 38 gallon plastic tank with hutch and harpoon mods. No problems since.
__________________
1997 F350 SRW CCLB 4x4 ZF5 7.3
2011 International Duraturd 4300 Mechanics truck
2001Tdi Jetta 5 speed
  #3  
Old 08-09-2018, 07:43 AM
cbuttre835 cbuttre835 is offline
Sergeant
Member's Gallery
 
Join Date: Jun 2011
Posts: 170
Default

Quote:
Originally Posted by ghohouston View Post
My selector valve failed between positions. Had the same setup. Got rid of it, and installed a sd 38 gallon plastic tank with hutch and harpoon mods. No problems since.
Which 38 gallon tank? I'll have to re read the mods you listed, I've heard of them before but can't recall them.


There was a guy on Ford-diesel.com who sumped both factory tanks, and left them tied w/o a selector to self balance their fuel. He could get 40 gallons out of the 17 and 19 factory tanks. I'd like to try that with a big rear tank, if I could keep the tops and bottoms relatively level.
__________________
But the conflict here is not between faith and science; it is between the competing faiths of theism and materialism, neither of which can claim to be proved by science. Modern physics has accelerated smack into the limits of the scientific method. It raises questions it cannot answer but that human beings cannot avoid -- matters of meaning and purpose. This is not a failure of science, just a recognition that measurement is not the only source of meaning.
  #4  
Old 08-09-2018, 08:02 AM
Magnum PD's Avatar
Magnum PD Magnum PD is offline
General
Member's Gallery
 
Join Date: May 2011
Location: VA
Posts: 8,323
Default

The broncos had a 38 gallon tank
__________________
96 F-350 RC 4x4 Hypermax Rods, PIS 300/200s G head tunes, Garrett GT4294, Beans IDM, ARP head & main, girdle, half filled block, DI cam, ceramic coated bowls, anti-friction skirts, Haldex pump over Honey Badger Jr, Diesel site High volume lpop, Billet intake Plenums, Dual SD pumps, Fluidampner, beehive springs, cosmetic head gaskets, Inconel valves, hardend guides, Ported and polished heads by me, home made RR fuel, 5 speed tranny, with SB 3600 DxD. Snow water meth.
  #5  
Old 08-09-2018, 08:19 AM
5 oh's Avatar
5 oh 5 oh is offline
Sergeant
Member's Gallery
 
Join Date: Jul 2015
Location: Shelton,CT
Posts: 107
Default

The tank in my obs is sumped. I have the selector valve you can have for free. PM me for details
__________________
1996 F350 S369SXE, 238/100, SRP 1.1, E-Fuel.....
  #6  
Old 08-09-2018, 08:21 AM
lincolnlocker's Avatar
lincolnlocker lincolnlocker is offline
General
Member's Gallery
 
Join Date: May 2011
Location: central michigan
Posts: 24,596
Default

Could be a ground issue also.

SD pumps are self priming.

live life full throttle
__________________
00,f350,4x4,cc,drw, under the knife
01 rclb zf6,4x4,srw,ts tunes,bfaf,4"exhaust, 3800lb dd clutch
12,f350,4x4,cclb,srw, rudys/punch it d3lete tunes, donaldson bfaf.
god bless america and the farmer who feeds your fat ass
  #7  
Old 08-09-2018, 07:15 PM
ghohouston's Avatar
ghohouston ghohouston is offline
Colonel
Member's Gallery
 
Join Date: Dec 2012
Location: Lewisville,Texas
Posts: 3,754
Default

Quote:
Originally Posted by cbuttre835 View Post
Which 38 gallon tank? I'll have to re read the mods you listed, I've heard of them before but can't recall them.


There was a guy on Ford-diesel.com who sumped both factory tanks, and left them tied w/o a selector to self balance their fuel. He could get 40 gallons out of the 17 and 19 factory tanks. I'd like to try that with a big rear tank, if I could keep the tops and bottoms relatively level.
A super duty 38 gallon plastic tank mounts where your current front tank mounts. Never have to worry about rust, or a selector valve. I think i paid close to $400 from Ford 2 years ago for a new one. And that was at cost. Why even have the worry of a 2nd tank?
__________________
1997 F350 SRW CCLB 4x4 ZF5 7.3
2011 International Duraturd 4300 Mechanics truck
2001Tdi Jetta 5 speed
  #8  
Old 08-09-2018, 07:43 PM
cbuttre835 cbuttre835 is offline
Sergeant
Member's Gallery
 
Join Date: Jun 2011
Posts: 170
Default

Quote:
Originally Posted by ghohouston View Post
A super duty 38 gallon plastic tank mounts where your current front tank mounts. Never have to worry about rust, or a selector valve. I think i paid close to $400 from Ford 2 years ago for a new one. And that was at cost. Why even have the worry of a 2nd tank?
Cool. I've only looked for the 33 or 38 gallon bronco tanks. I'll dig into that for sure.
__________________
But the conflict here is not between faith and science; it is between the competing faiths of theism and materialism, neither of which can claim to be proved by science. Modern physics has accelerated smack into the limits of the scientific method. It raises questions it cannot answer but that human beings cannot avoid -- matters of meaning and purpose. This is not a failure of science, just a recognition that measurement is not the only source of meaning.
  #9  
Old 08-09-2018, 08:35 PM
wildbill963258's Avatar
wildbill963258 wildbill963258 is offline
Sergeant
Member's Gallery
 
Join Date: Dec 2014
Location: In Lawrenceburg, Kentucky
Posts: 378
Default

Could run a 38 gallon sd tank and a 38 gallon bronco tank in the back and just have the rear tank fed into the front tank
__________________
'94.5 F350 CCLB 2wd ZF5 DIY CAI 3" DP for exhaust and stock tunes for now

  #10  
Old 08-11-2018, 01:17 AM
old man dave's Avatar
old man dave old man dave is offline
Lieutenant
Member's Gallery
 
Join Date: May 2011
Location: Petaluma, CA
Posts: 993
Default

Rockauto lists the 38 gallon rear tank as a tank for a 1988 F-250 351. Spectra Premium F26E. About $133 at Rockauto. More or less a bolt-in.

The 33 gallon tank is the Bronco one.
__________________
97 California truck 400hp throught the stock muffler.

Last edited by old man dave; 08-11-2018 at 01:21 AM.
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -6. The time now is 12:43 AM.

 

Powered by vBulletin®
Copyright ©2000 - 2018, vBulletin Solutions, Inc.

Designed by Military Ltd