Delete the return line off filter?
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Laughing Gas
Joined: Oct 2012
Posts: 755
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From: Rockport MA
Delete the return line off filter?
I remember reading about deleting the return off the fuel filter as a performance upgrade, I wasn't sure about it and wasn't in the position to do it, but now I just got my Racor heated fuel filter upgrade and am curious if I should delete the return line now? Does this sound like a good idea?
Thanks Again,
Devin
Thanks Again,
Devin
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Laughing Gas
Joined: Oct 2012
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From: Rockport MA
Lead Driver
Joined: Apr 2008
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I would take it off. I remember reading somewhere it was a TSB from ford to pull it as it gives air a high place to go and leads to air intrusion. The IP has the ability to purge some air, although as in the thread linked, alot of air can cause surging, more so air and no fuel though.
None of my IDIs have that hose, and none of them surge, nor have air intrusion problems.
None of my IDIs have that hose, and none of them surge, nor have air intrusion problems.
Junior User
Joined: Sep 2015
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The fuel return/recirculate on these IDI's is the most *******ized system I have ever seen! After designing/engineering piping systems for 35 years and then looking under the air cleaner I could pull my hair out. But after I get a few minor issues this fuel system is getting updated and stream lined.
Postmaster
Joined: Dec 2011
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The fuel return/recirculate on these IDI's is the most *******ized system I have ever seen! After designing/engineering piping systems for 35 years and then looking under the air cleaner I could pull my hair out. But after I get a few minor issues this fuel system is getting updated and stream lined.
It'll work just fine as long as you get fuel to the pump and the pump return has some place to go.
Also need some place for the injector returns to drain to, or you'll end up with a mess on your hands. :P
i ain't rite
Joined: Mar 2005
Posts: 65,469
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From: Marlboro Mental Hospital.
I would take it off. I remember reading somewhere it was a TSB from ford to pull it as it gives air a high place to go and leads to air intrusion. The IP has the ability to purge some air, although as in the thread linked, alot of air can cause surging, more so air and no fuel though.
None of my IDIs have that hose, and none of them surge, nor have air intrusion problems.
None of my IDIs have that hose, and none of them surge, nor have air intrusion problems.
i eliminated the one on my 88, 89, and 90's back in 1990 and on all the other trucks as soon as i took delivery from ford and have not had any issues since then.
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Laughing Gas
Joined: Oct 2012
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From: Rockport MA
Awesome, sounds like a plan. I do recall reading it would be a performance benefit, but I am skeptical about that.
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i ain't rite
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From: Marlboro Mental Hospital.
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Laughing Gas
Joined: Oct 2012
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From: Rockport MA
So I had another thought I wanted to expand on this topic with. So we had a pretty cold day yesterday, about 5 degrees, and today was probably up to about 30. So I hadn't started in a few days so I thought, I don't have to go anywhere but lets see how my truck starts, after these cold days and not being plugged in. So after a few tries and a few minutes I got it to start, it took a few cycles of the glow plugs.
Anyway here's my thought, with my new heated fuel filter, in a scenario exactly like this, my thought is I could flip the switch on the filter for a minute and warm up and un-gel the fuel and with the deleted filter return line I would force more gelled fuel out of the injector lines, and be able to start he truck much easier.
Thoughts?
Devin
Anyway here's my thought, with my new heated fuel filter, in a scenario exactly like this, my thought is I could flip the switch on the filter for a minute and warm up and un-gel the fuel and with the deleted filter return line I would force more gelled fuel out of the injector lines, and be able to start he truck much easier.
Thoughts?
Devin
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Laughing Gas
Joined: Oct 2012
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From: Rockport MA
To further explain my point, it would be less un-gelled/heated fuel just being pushed back into the tank where it is not needed and more of it going to the injector lines.
Devin
Devin
Lead Driver
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OP warming the fuel doesnt seem to really help at all. I was up **** creek, out of ether, and was about 15*. Pickup had sat just long enough it wouldnt catch. No provision for using the block heater, i had a power inverter and a hair dryer. Turned the key on (fuel solenoid will create heat in IP) and set the hair dryer on the IP / intake. After about 20 minutes i gave up. Dug out some brake cleaner or WD40 or something, opened up the air box, and built a nice cozy fire in the intake and she fired right up.
i ain't rite
Joined: Mar 2005
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From: Marlboro Mental Hospital.
i know a guy that used to put a pan of burning coals out of his wood stove under his truck every morning to heat it up so he could start it because he was too cheap to replace the glow plugs.
until one day the fuel filter leaked and dripped into the pan of coals and burned the truck into a crispy kritter.
until one day the fuel filter leaked and dripped into the pan of coals and burned the truck into a crispy kritter.
Fleet Mechanic
Joined: Nov 2010
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From: Kville, ohio
I know a guy that would build a literal fire under his TD9 international dozer to get her to light on cold morning. I have used torpedo heaters to get cold equipment started before. that works pretty well in a pinch
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