7.3 duel inlet mod

[melmount]

7.3 fuel inlet mod

How are you guys doing the fuel inlet mod?
Just cutting the line? using rubber hose and clamps?
what about the pump side?
thx

 

[Tail_Gunner]

Are you refering to the "Hutch" mod?

I didn't mess with the return line.

For the supply line, I installed a rubber fuel line rated for diesel fuel and regular hose clamps from the top of the tank to the fuel pump.

 

[BIG JOE]

How are you guys doing the fuel inlet mod?
Just cutting the line? using rubber hose and clamps?
what about the pump side?
thx

If yer refering to the Fuel Pump inlet mod.... Yul want to replace that Whole fitting assembly (plastic line, fitting, and 1 crimp clamp), that connects the steel line from the tank, to the inlet of the fuel pump.

There's specail tool available to release the QD type connector at the fuel pump... But, IMO, for the cost, and.. it's a One Time, Permentent fix... a pair of needle nose pliars or Vise Grips will do the job (yer call).

1. Pre-cut the diesel friendly fuel hose to needed length, put a band clamp on each end.

2. Remove the old fitting assembly, install the new hose... Be ready and be Quik.... fuel will dribble out.. from the tank.

3. Tighten the clamps. Cycle the key 2-3 times.. but don't start the engine.

Start the engine, check for leaks.. yer done.

Joe

 

[melmount]

So a short piece of hose? I dont have to go from the tank? I will look at it tonite when the wife gets home with it. I have the tools to remove the quick disconnect stuff.
I assume the fuelline is metal coming from the tank along the frame?i have a tubing cutter and stuff. What does the end look like from the pump? is there a nipple sticking out or enough sleeve for me to put the hose over and clamp it?

 

[melmount]

I read the articles now, cool thanks. Interested in though, i thought at first I was only dealing with the one prior to entry to the pump. Isnt this one the most likely culprit? I see why replace all of it. But out of tank and out of pump is backwards to the inside of pump. All can leak air but isnt that direction weorse? The larger end is going over small end?(am i describing it right) Going in that direction over the inlet side would be weorse than the other 2? thoughts?

 

[BIG JOE]

So a short piece of hose? I dont have to go from the tank? I will look at it tonite when the wife gets home with it. I have the tools to remove the quick disconnect stuff.
I assume the fuelline is metal coming from the tank along the frame?i have a tubing cutter and stuff. What does the end look like from the pump? is there a nipple sticking out or enough sleeve for me to put the hose over and clamp it?

Yes, it's metal, and Yes there is a nipple on the inlet end of the fuel pump..AND the end of the fuel line.. coming from the tank.

But out of tank and out of pump is backwards to the inside of pump. All can leak air but isnt that direction weorse? The larger end is going over small end?(am i describing it right) Going in that direction over the inlet side would be weorse than the other 2? thoughts?

ALL yer guna do is.. Replace that piece of plastic line with the QD fitting on the inlet end.. and a crimp clamp on the other end*... that goes INTO the pump, from the tank.

It being a "Pump".. it [sucks] fuel from the tank end.. and "Pumps" it up to the engine/fuel filter.... under PRESSURE.

That QD (Quick Disconnect) type of fitting on the inlet end, is Real suspect of allowing air to be Sucked into (and mix it into) the fuel..... Because it's PRESSURE type of fitting... Not a SUCTION (air tight) type of fitting.

I say this because: I've done about 75 of these.. and every one of them has shown an improvement in the engine idling smoother, a bit less Cackle and a Seat O' the Pants.... bit better throttle response.

I'm not saying EVERY one of the fittings leak..... But I haven't run onto one yet, that didn't... based on the above results. Especially after Time & Miles, on the 7.3s.

*Crawl under yer truck and study the fitting assembly I've described.. It'll come to ya.

Joe

 

[melmount]

thanks, my question now is, am I just foing the end at the (inlet side)pump for now?
Do i have to do the one at the tank too?along with the pick up part of the mod?
I read the long thread on the whole deal. sounds like a good idea. I was not planning on dropping the tank yet. Its quick disconnect on the tank outlet too right?
thanks pal

 

[clintusaf]

Sorry, I'm still a newb at this stuff guys. What exactly is this mod and what does it improve?

 

[melmount]

basically, is there one of these at the tank too?
quote from a previous thread
" the "LOOSE, faulty, flimsy" fuel hose at the pump inlet to eliminate air being sucked into the fuel supply system"

 

[BIG JOE]

thanks, my question now is, am I just foing the end at the (inlet side)pump for now?

Yes.

Do i have to do the one at the tank too?along with the pick up part of the mod?

No.

I read the long thread on the whole deal. sounds like a good idea. I was not planning on dropping the tank yet. Its quick disconnect on the tank outlet too right?

Yes, but more correctly: It's down [inside] the tank, on the fuel pick-up/fuel gauge sending unit assembly.

thanks pal

Sorry, I'm still a newb at this stuff guys. What exactly is this mod and what does it improve?

You Don't want ANY air in a diesel engines fuel system. A given.

On Ford PSD's with frame mounted, 12v fuel pumps, there is a fuel line fitting/connector on the inlet (rear) end of the fuel pump that is Very Questionable as to it's air tight integrity.. under suction.

Removing & Replacing this fitting with a piece of (diesel compatible) fuel hose and 2 band clamps, eliminates the possibility of any air being sucked in, then mixed, into the fuel system. From At Least.. this fitting.

What does it improve ? Air bubbles in the PSD fuel system is a Root contributor to the "Cackle" we hear, the "Shaky" engine idle.. and the Sometimes "Lagy".. throttle response.

Doing this 10 dollar, 30 minute Mod, can noticeably.. reduce that.

basically, is there one of these at the tank too?
quote from a previous thread
" the "LOOSE, faulty, flimsy" fuel hose at the pump inlet to eliminate air being sucked into the fuel supply system"

Well said.. by whomever wrote that.

Joe