Bad filter head check valve..

[G.W BUFFALO]

Well reading thru ld post's i found that i should check the condition of the retern hose check valve on my filter head. I checked it earlier and i's wide open, not working at all.. Any chance it's to blame for the hard start issue?? Funny thing is it said in the older post's that the check valve being bad wuld cause air to get into the filter head causing a hard start. However every time i've pulled the filter it's been completly full.. So should i replace it, or will it not make any diferance.

Here's the valve i speech of..

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[Silver Burner]

I would say if you pull it and can see through it, replace it. It could just be some air in your return lines causing the hard start, but that check valve is almost for sure the culprit. Also, just in case you have a small lift pump issue like I do, try parking the truck facing downhill. Mine always starts great like that. If I face it uphill, hard starts...

 

[G.W BUFFALO]

I got an electric pump, Geuss i should probly replace this filter head valve then..

 

[Silver Burner]

Duh, shoulda read your sig...lol

 

[subway]

i pulled mine out with no noticable issues, mine is just plugged now so i can switch my fuel supply for WMO. they help but are not neccisary.

 

[icanfixall]

My rig has never ever had this check valve in the filter head. I understand it has a spring and ball in it. Any trapped air will pass thru it but fuel causes the ball to stop flow. I dought you can buy just this valve but try anyway...

 

[G.W BUFFALO]

Ya i found it, part # E8TZ9K061A. It's avalibe from oregon fuel injection.

 

[G.W BUFFALO]

Are you guy's saying i don't even need a return for the filter head and i could just plug it??

 

[Optikalillushun]

How do ya know iffin its bad? This the port the return lines goes to? I removed a bunch of stuff from mine and i dont rememeber what was where.

 

[G.W BUFFALO]

yes it's a return hose for the filter head, when you remove it you look thru the hole.. If you can see light thru it it's bad, the check valve should always be closed unless fuel is flowing thru it.. Thats how i understand it.

 

[subway]

yea i removed and plugged mine since i have two filters and a solenoid to switch between the fuel systems.

 

[levigibbs]

I just pulled mine out. Can see light clear through it. I've seen a lot of people delete this line. Mine runs from the filter to the driver side return line. Is there a downside to plugging this return line?

 

[Black dawg]

That hose lets air off the top of the filter and out the return instead of being forced through the pump. If you dont make a habit of running tanks real low it will be fine.

 

[Old Goat]

That`s the line from the Filter to the first Injector on the passenger side. If so, there was a TSB( Technical Service Bulletin) from Ford to delete this line. I guess early on there
was a problem with it bleeding off fuel from the filter.

I deleted mine on the 86 quite a few years ago when I first
read about it. never a problem with doing it.


Goat

 

[mf7lakes]

Ford TSB deleted the return hose from the filter. Filter is plugged by a kit from Classic Diesel Designs that also deletes filter fuel heater ( and the leak).

Quoting CDD instruction ---> on most 7.3 fuel systems there will be line coming from the filter header going to the #1 injector return cap, remove the brass barb fitting from the filter head and the bypass ball and spring if not already rotten away and plug the port with the silver ⅛ npt plug included in the kit