91 e250, hi press pump issue
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4wd Low
Joined: Oct 2010
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91 e250, hi press pump issue
Replaced all 3 pumps last year. Now it is only getting 10 psi on fuel rail. I put a Bosch pump on it in hopes it would last. Delphi in both tanks.
What would do me better for the hi pressure pump.
Thanks in advance Ken
What would do me better for the hi pressure pump.
Thanks in advance Ken
Lead Driver
Joined: Mar 2006
Posts: 6,259
Likes: 438
From: IL
If you pull the line off the top of the FPR and gas comes out its bad, but if you're cycling the key 6 or 7 times it's probably one of the pumps. Now uf it runs the same on both tanks then its probably either the high pressure pump or possibly the fuel filter on the frame could be clogged up.
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4wd Low
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yes, put a new fuel filter in at the same time..
When it gets the pressure on the fuel rail it does hold it. That's what makes me think it is a pump issue.
When it gets the pressure on the fuel rail it does hold it. That's what makes me think it is a pump issue.
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Lead Driver
Joined: Mar 2006
Posts: 6,259
Likes: 438
From: IL
What you could do to make sure that there's not a blockage is to pull the fuel line off the out side of the HP pump, put your gauge on the pump and see what it reads.
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4wd Low
Joined: Oct 2010
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Got it figured out, both in tank pumps are not running. From searching FTE. Learned how to pull in the fuel pump relay, then unplugged the pump on the flame. Neither in tank pumps would run. Switched from tank to tank and hit the both of tanks, but to no use.
So I'm guessing that the hi pressure pump was pulling fuel from the tank, and giving me the 10 psi, but couldn't pull and deliver 30 psi.
This is a great forum.
So I'm guessing that the hi pressure pump was pulling fuel from the tank, and giving me the 10 psi, but couldn't pull and deliver 30 psi.
This is a great forum.
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