Banjo bolts - They replace the banjo bolts where the fuel lines go into the heads. The original ones have smaller holes and a checkvalve, restricting flow. Will you notice a huge gain? No! Will you notice anything? I doubt it! will you theoretically improve fuel flow to the injectors? Yes. For the price you pay for new bolts/crush washers it's worth it, IMO

Updated FPR - I'm extremly happy with this one. My fuel pressure went from 50psi at idle to 64psi :thumb: and at WOT, with the old spring, I'd see pressure as low as the mid 30psi range, I can't get it under 50psi now :thumb::thumb::thumb:

 

If you get a fuel pressure gauge and your pressure is low this is the fix.

Mine before i installed the fuel pressure gauge i had 50 lbs at idle and 44 at WOT and that is to low, installed the kit now 62 idle and 58 WOT, low fuel pressure will kill injectors and over 70 lbs may blow injector o-rings.

The Reg. Kit number is 3C3Z-9T517-AG and you get it form Ford
The spring is located behind the small plate that the return line attaches to. This is probably one of the easiest repairs you can make... Take the four screws loose (they are T-27 torx screws), change pull the old spring out of the brass cup, put the new spring in and re-install the plate. When you are taking it loose, keep your thumb on the plate so the spring/cup doesn't pop out and also use your thumb to hold the plate up tight to the fuel bowl when re-installing, so the screws can be threaded in good. If you buy the whole kit (which I think is the only way you can get it from Ford), I would replace the brass cup while you are at it..
You can see the plate and return line here.
Page 30: Fuel Supply System

The only hard part is the hose is in the way, you need to get a turkey baster a new one and suck out all the fuel from the upper filter houseing that way you don't have a mess. After you are done you have to cycle the key 3 time 30 sec. each time to prime the fuel system. Hope this helps
2 stroker:ford:

 

Here you go this is a good post by Band Member over at the Dieselstop on the fuel pressure reg spring install.
Fuel Regulator Upgrade w/ Pictures - Diesel Forum - TheDieselStop.com
2 stroker:ford:

 

when I pick up my truck from the dealership when they are done with my ARP's I will be buying the fuel spring kit and 6.4 banjo bolts. Loooks very easy to do and hopefully my truck won't falll on its face wot on the extreme street tune. Thanks for the info

 

Good thread on banjo bolts .

 

I agree. :thumb:

 

Great thread right here with the links. It just answered every question I had about replacing the bolts and spring thanks

 

Thanks to ALL!!! You have convinced me, I am going to do it. I am getting ready to change fuel filters anyway but will wait and order the new bolts and spring kits.....This forum is the greatest!:woot:

 

6.4 banjo bolts

Thanks for the great advise. I ordered mine this morning.

 

Does the FPR spring upgrade apply to all 6.0's? I don't have a fuel pressure gauge so I'm not sure what pressures I'm running. I have a 2007 F250. Just want to make sure I need it before throwing money at it. Thanks!

 

Yes. It is more of a preventative measure, but the only way to know for sure is to hook up a gauge.

 

Sorry bud, can't help you with the 2007. This may help:
Fuel Regulator Upgrade w/ Pictures - Diesel Forum - TheDieselStop.com
Good Luck

 

Yeah I read that, thanks. I just wasn't sure if ford fixed it by 2007 or not. From what I'm seeing it doesn't look like it.

 

Okay got a question about the banjo bolts. I undertand how they would flow better than the old ones with the check valve, but why do the old ones have the valve in them anyway? :dunno: International must have put it there for a reason, doesn't the valve keep fuel at the injectors when the engine is shut off?

I would like to do them but this has been bugging me for a while, which kept me from buying a set. Just a thought that's all.

 

I've seen something on here before about the check valve... They apparently thought that the waves from the injectors might line up and create a big wave. They guy said the only way he could wrap his brain around it (and for me too) is that, get a kick board and go in a pool. Go in and kick your legs. Look behind you occasionally the waves will line up and distorted it a bit. Now put a board(check valve) under you. Kick in the water, you notice that the waves no longer line up anymore..

Course I may not remember right, but I think that is what he said. He also said that he heard this from someone eles and may still be wrong.. But for me it makes sense and has really bothered much since, still wonder why though. No one eles has it in there engines..

 

The filter in the fuel bowl will also stop the waves.
Or you can look at it this way...If the check valves were so valuable to the system then why would they not have them for the 6.4 also?

Plus this mod goes along way back, I think by now if there was a problem we would have known about it by now. There are many forums where people have done this mod with only positive results.

 

Thats exactly what I am saying/thinking. If its so important but it on the 6.4 also.

 

Can you do the spring mod without doing the banjo bolts though?

 

......Yes.

 

I just 6.4 banjo's today, the driver side is a pain in the butt!! Next will be the spring.

 

I installed my Spring kit friday night, I took the truck down the road saturday and noticed my fuel pressure is up to 68 psi from just under 50. When i drove the truck the pressure would stay right around the high 60's but one time i noticed that when i took off it would drop to almost 40 psi then when i push in the clutch and shift it would jump back up to 68, the nback onthe throttle and it would drop down to 40 again, did this the whole way to 6th. Hasn't done it since. Could have this been just air in the system or is my stock pump going out? Stock injectors with mild tuning. truck only has 50k on it.

 

Any dangers with the banjo mod or more importantly the regulator spring mod if you have a FASS fuel system??? I know one guy said 70psi blows o rings??? I ask because weather im pulling a huge trailer or ripping on her she barely moves from 55psi! I really want to do it and its a seems like a walk in the park after all the other mods I have done in the past but just dont want to mess anything up with too high of a pressure?

 

Think about the updated fuel regulator spring like this:
International and Ford both sell them. Both versions raise the pressure to the 70psi neighborhood. Why would Ford and International create a spring that could put them on the hook for new injector o-rings?

 

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