No start 2000 Ex.
Veteran/Sheepdog
Joined: Feb 2012
Posts: 6,047
Likes: 110
From: Western AR
You can test the fuel pressure on the back of the fuel bowl. Much easier than doing it down at the pump, and you include all the lines between the pump and the bowl. -4 ORB fitting, and you have two ports to choose from...one before the filter element on the driver's side of the bowl, and one after the filter element on the passenger/bottom side by the drain lever.
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Freshman User
Joined: Jun 2010
Posts: 35
Likes: 0
Fuel pressure
Thanks nikmike,
I will take your advise and tap into the fuel bowl. I think after the filter is the best place, even though I just changed the filter after 180k miles. Dumb me didn't even know that is a regular maint item but will sure keep it changed regular now.
I will take your advise and tap into the fuel bowl. I think after the filter is the best place, even though I just changed the filter after 180k miles. Dumb me didn't even know that is a regular maint item but will sure keep it changed regular now.
Last edited by Archersfin; Jul 16, 2019 at 07:06 AM. Reason: More info
Veteran/Sheepdog
Joined: Feb 2012
Posts: 6,047
Likes: 110
From: Western AR
Yes, the top line with the two torx screws holding the fuel pressure regulator housing on has a spring inside. That spring determines the pressure that has to be reached before fuel can return to the tank. That pressure can be changed with a stronger or weaker spring.
The test ports are on the back side of the bowl.
The test ports are on the back side of the bowl.
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Freshman User
Joined: Jun 2010
Posts: 35
Likes: 0
Fuel pressure
I am having a hard time finding a fitting to screw into the top plug on the back of filter housing that I can adapt to the pressure guage with the Schrader fitting. Tried all the auto parts places, 5 of them both box stores and no luck.
Any suggestions?
Any suggestions?
Veteran/Sheepdog
Joined: Feb 2012
Posts: 6,047
Likes: 110
From: Western AR
Try a hydraulic house..."fitting store" as they are called on the east coast. Any place making hydraulic hoses should have -4 ORB fittings that go to a hose barb on the other end.
My pressure tester is a -4 ORB with hose barb fitting>1/4 ID rubber hose rated at 300 psi>hose barb with 1/8" NPT to a pressure gauge. I use this same hose to screw into the top of the HPOP reservoir to check low pressure oil from the LPOP. Same fitting...
My pressure tester is a -4 ORB with hose barb fitting>1/4 ID rubber hose rated at 300 psi>hose barb with 1/8" NPT to a pressure gauge. I use this same hose to screw into the top of the HPOP reservoir to check low pressure oil from the LPOP. Same fitting...
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Freshman User
Joined: Jun 2010
Posts: 35
Likes: 0
Fuel pressure
Thanks nicmike,
I looked for a hose barb fitting while out and about yesterday. 4ORB is the problem I am having. I will just hook up guage to the pressure side of the fuel pump and see if I have any pressure at all. I can hear the pump running when I turn on the key but that doesn't mean there is pressure.
I looked for a hose barb fitting while out and about yesterday. 4ORB is the problem I am having. I will just hook up guage to the pressure side of the fuel pump and see if I have any pressure at all. I can hear the pump running when I turn on the key but that doesn't mean there is pressure.
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Freshman User
Joined: Jun 2010
Posts: 35
Likes: 0
Fuel pump
I pulled the fuel pump since I had NO pressure showing on the guage. I noticed there was no fuel coming out of the line to the tank so might have problems there.
I hooked up the pump to voltage just to see if it was trying to work and what do you know fuel pumped from a bucket. Now my question is can I deadhead the pressure side after my guage to see if it will put out pressure. I don't know how much pressure will be generated without a relief valve.
I hooked up the pump to voltage just to see if it was trying to work and what do you know fuel pumped from a bucket. Now my question is can I deadhead the pressure side after my guage to see if it will put out pressure. I don't know how much pressure will be generated without a relief valve.
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Freshman User
Joined: Jun 2010
Posts: 35
Likes: 0
Fuel pump
I went ahead and deadheaded the pump and it is putting out 65psi. Looks like the problem is in the tank. GRRRR: I just filled it up before this trouble. I need to get a bunch of diesel cans to siphon it out. Gonna blow back into the tank to listen for bubbles.
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Freshman User
Joined: Jun 2010
Posts: 35
Likes: 0
Fuel pressure
I decided to put the pump back in and see if the truck would run sucking from a can of fuel. Jumped the starter relay and same thing as before. Just tries to run like it is flooded. Waiting for my Ford adapter so I can check fuel pressure at the bowl. If that is ok then going to the injector pressure for each head.
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Joined: Sep 2003
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From: Houston, Texas
I'm just south of you, I'm on vacation next week but could come with my IDS in hand to help diagnose the week after.