Fuel woes help identifying inline device

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Nov 23, 2021 | 07:33 AM

coneheads

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Fuel woes help identifying inline device

Does anyone know what the flying saucer looking device that is in the fuel line is or what it does?

Nov 23, 2021 | 07:47 AM

timbersteel

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From: Mexico, Missouri

I know it's on both my '95s, but wasn't on either of my '92's.

As I recall, it is a dampner of sort. I've read about its function here, but it's been sometime ago.

Nov 23, 2021 | 08:44 AM

JJF20

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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...

Nov 23, 2021 | 08:58 AM

evan_nugget

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From: Manassas, VA

I've heard the same. My '96 has one as well.

Nov 23, 2021 | 09:18 AM

coneheads

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Quote:

Originally Posted by timbersteel

I know it's on both my '95s, but wasn't on either of my '92's.

As I recall, it is a dampner of sort. I've read about its function here, but it's been sometime ago.

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.

Nov 23, 2021 | 09:59 AM

rla2005

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From: Kentucky

Quote:

Originally Posted by coneheads

but it will not start until the pump shuts off and the system is at pressure.

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.

Nov 23, 2021 | 11:02 AM

coneheads

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Quote:

Originally Posted by rla2005

I'm just passing time waiting on the fuel pressure gage to arrive not ignoring you're advice. The ECM is in the $300 range and I am just trying to get an understanding of the symptoms I see, there is no pressure on the system after 1 to 2 seconds and the motor will not start, starting fluid will get it started but there isn't any fuel to keep it running. The fuel pump runs continuously for 30 minutes and shuts off at which point the engine starts and runs normally until it sits for some time and the system depressurizes. So in my mind the clock circuit in the ECM has nothing to do with the pressure or lack thereof in the fuel system which is why I am waiting for the fuel pressure gage to verify the pressure status from the 1 to 2 second normal operation through to the system reaching pressure at 2 minutes 10 minutes or the full 30 minutes and how long the system holds the pressure. I have already apparently spent money needlessly by not having all the information and making assumptions I'm trying to avoid any further self inflicted wounds no offence intended.