Fuel woes help identifying inline device
Hotshot
Joined: Nov 2017
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From: Northern Ontario
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As Timersteel said, it is a pulse dampener according to the FSM. I'm not sure of the exact function of it either, other than there must be a pulse/wave in the fuel from the pumps that Ford was trying to solve. The return line on my '96 has two small crimps in it close to that area as well, might have the same idea, although I have no idea why the return would matter.
I'd be interested if someone knows more out of curiosity...
As Timersteel said, it is a pulse dampener according to the FSM. I'm not sure of the exact function of it either, other than there must be a pulse/wave in the fuel from the pumps that Ford was trying to solve. The return line on my '96 has two small crimps in it close to that area as well, might have the same idea, although I have no idea why the return would matter.
I'd be interested if someone knows more out of curiosity...
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Cross-Country
Joined: Oct 2021
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Well my issue is it takes 30 minutes plus for the fuel system to reach enough pressure to start the engine after which it runs fine, I have replaced both FDM's and the Fuel pressure regulator with no change in the symptoms. There is nothing original left besides the fuel lines, I saw this device when I took the upper intake manifold off to replace the regulator. I just wondered if it has anything to do with providing the resistance required to pressurize the system. I can hear the fuel circulating to the fuel rail and directly back to the tank with essentially no pressure building up. I don't have a fuel pressure gage but one is on the way and I will know for sure what the pressure is but it will not start until the pump shuts off and the system is at pressure.
Fleet Owner
Joined: Oct 2005
Posts: 20,789
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From: Kentucky
There is no feedback to the computer to tell it to shut off the fuel pump when a certain pressure is reached. It's a simple clock circuit designed to energize the fuel pump relay for ~ 1-2 seconds every time the computer is turned on via the key switch.
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Cross-Country
Joined: Oct 2021
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In your other threads you have been told multiple times you have a bad computer. Classic symptom is the fuel pump relay remains energized by the computer when the key is cycled from the Off to Run position. Very few wait 30 minutes or more to see if it shuts off.
There is no feedback to the computer to tell it to shut off the fuel pump when a certain pressure is reached. It's a simple clock circuit designed to energize the fuel pump relay for ~ 1-2 seconds every time the computer is turned on via the key switch.
There is no feedback to the computer to tell it to shut off the fuel pump when a certain pressure is reached. It's a simple clock circuit designed to energize the fuel pump relay for ~ 1-2 seconds every time the computer is turned on via the key switch.
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