Can I run my 1990 F-150 by removing the front fuel tank and use the rear tank only?

Tiny
NMOKLER
  • MEMBER
  • 1990 FORD F-150
  • 5,800 MILES
I removed the front and I don't want it back on. I just removed the pump and hoses then reconnected the fuel lines but hoked lines u backwards forcing fuel in to the vacuum lines running to the throttle body. It ran for a bit choked up puked fuel out the front end. Dummy move realizing what i'ed done fixed the lines. Butt I did leave the electrical wiring harness. I'm wondering if a relay is senses that there is no front fuel pump connected. It tried to start butt now battery is dead
Saturday, January 14th, 2012 AT 12:48 AM

4 Replies

Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
The tanks have low pressure pumps, the high pressure pump is on the frame, you might need to buy a pump four a single tank system.
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Saturday, January 14th, 2012 AT 12:57 AM
Tiny
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So it wont run with just the pump in the rear tank. All have is a filter inline in the frame its got the 5.0L fuel injected motor. Does this have anything to do with my problem?
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+1
Saturday, January 14th, 2012 AT 1:09 AM
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
If you go to autozone you can rent a pressure tester. You need at least 35psi at fuel rail test port. Check that and get back to me.
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Saturday, January 14th, 2012 AT 1:49 AM
Tiny
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Ok thank you
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Saturday, January 14th, 2012 AT 1:55 AM

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