« previous next »
Pages: [1]   Go Down

Author Topic: Fuel System Schematics (and fuel gauge troubleshooting)  (Read 79490 times)

Offline 87r10shorty

  • Newbie
  • Posts: 22
Fuel System Schematics (and fuel gauge troubleshooting)
« on: August 04, 2008, 03:02:31 pm »
Anyone have a fuel line schematic for a dual tank setup on a 87?
Basically what I am trying to do is a dual tank to single tank conversion.
If any one has a write-up on how to do that, that would be great.
« Last Edit: October 22, 2008, 07:29:58 pm by Captkaos »
Logged

Offline Captkaos

  • OWNER and Administrator
  • Administrator
  • Senior Member
  • *****
  • Posts: 18471
    • http://www.73-87chevytrucks.com
Re: Fuel Line Schematic
« Reply #1 on: August 04, 2008, 03:51:32 pm »
If you are eliminating one of the tanks, just pull the switching valve off and connected the lines accordingly.  You will have a supply, return and Vent.  Use EFI rated hose though.
Logged

Offline 87r10shorty

  • Newbie
  • Posts: 22
Re: Fuel Line Schematic
« Reply #2 on: August 05, 2008, 08:26:19 pm »
I thought the power for the pumps ran through the switching valve, will the fuel pump still work with no valve in place?
I went ahead and unplugged the switching valve, and ran my lines together bypassing the valve. I tried to start the truck no joy. I don't even hear the fuel pump kick on. What is my next course of action.  While the lines were undone from the valve i went in to the cab turned the key and hit the tank selector switch, gas poured out of the valve, so i would guess the selector valve is good.
« Last Edit: August 05, 2008, 09:34:03 pm by 87r10shorty »
Logged

Offline VileZambonie

  • Global Moderator
  • Senior Member
  • *****
  • Posts: 19210
Re: Fuel Line Schematic
« Reply #3 on: August 05, 2008, 10:14:00 pm »
...
« Last Edit: April 12, 2024, 04:18:50 pm by VileZambonie »
Logged
,                           ___ 
                         /  _ _ _\_
              ⌠¯¯¯¯¯'   [☼===☼]
              `()_);-;()_)--o--)_)

74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline Captkaos

  • OWNER and Administrator
  • Administrator
  • Senior Member
  • *****
  • Posts: 18471
    • http://www.73-87chevytrucks.com
Re: Fuel System Schematics (and fuel gauge troubleshooting)
« Reply #4 on: May 14, 2012, 11:43:01 am »













Logged

Offline Irish_Alley

  • Tim
  • Moderator
  • Senior Member
  • *****
  • Posts: 13333
  • Family is not an important thing. It's everything.
Dual tank wiring schematic
« Reply #5 on: June 23, 2015, 11:15:19 pm »
« Last Edit: February 08, 2017, 09:28:35 am by Irish_Alley »
Logged
If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley

When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes

Offline VileZambonie

  • Global Moderator
  • Senior Member
  • *****
  • Posts: 19210
Re: Fuel System Schematics (and fuel gauge troubleshooting)
« Reply #6 on: September 23, 2017, 09:25:19 am »
Dual Tank TBI Gauge

Dual Tank TBI Relay

Single Tank TBI Gauge

Single Tank TBI Relay
« Last Edit: November 06, 2023, 05:05:39 pm by VileZambonie »
Logged
,                           ___ 
                         /  _ _ _\_
              ⌠¯¯¯¯¯'   [☼===☼]
              `()_);-;()_)--o--)_)

74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline VileZambonie

  • Global Moderator
  • Senior Member
  • *****
  • Posts: 19210
Re: Fuel System Schematics (and fuel gauge troubleshooting)
« Reply #7 on: October 01, 2018, 03:09:08 pm »
Logged
,                           ___ 
                         /  _ _ _\_
              ⌠¯¯¯¯¯'   [☼===☼]
              `()_);-;()_)--o--)_)

74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10
Pages: [1]   Go Up
« previous next »