Have any of you guys every tried to boost the fuel pressure on the 6oh. I did it to my 97 f 350 with the 7.3 with a bb. Plus i did it to my 99 with a screw. What is the pressure suppose to be on the 6oh in a ford and the t365 international. If i remember right it was a difference with the 7.3. Between the two. Ford was 45 and international was 60. Mighty big difference in the two. Thanks

 

Fuel pressure spec is 45-55 psi.

 

Not worth it. Boost the psi and you could damage the injectors. If you want more fuel, go with larger injectors.

 

They say above 75 psi is max for the o-rings and is not good.
I run my Airdog II and ITP RR at 66-68 and my truck loves it.

 

I shimmed my regulator last week and am running around 70 at idle and 62 at WOT. So far so good. Truck seems to run just fine.

I think I may have stretched the spring a little too much and am running a little on the high side but thought I would see how it goes for a week or two.

 

Well i dont know about it being bad for them. My 97 fuel pressure was running so high it was blowing the o rings out of the fuel filter. I found a better o ring at freightliner for it and never had a single injector problem in 375000 miles. I would still be running it if my help wouldnt have wrecked it. The best truck i ever owned. My 98 dodge was a piece of crap except for the engine. I have owned many trucks from all companies. And the only ones to handle my abuse is fords. When i buy one all i do is change oil and the filters when i think about it. It is not uncommon for me to go 10000 miles on oil changes. Never had one spin a rod or main bearing or any problem because of lubrication. Only use rotella oil and mainly wix filters. I will not flush a transmission till it goes out and is replaced. My mechanic told me if an automatic is shifting fine dont touch it. I abuse a truck like they do in the commercials and then some more.

 

how do you go about shimming the regulator i wouldnt mind trying that

 

The fuel return regulator is nothing more than a spring and block-off port. All you have to do is take the cover off the side of the upper fuel filter and it will pop out at you. Some have installed a BB in with the spring to truly "shim" it. I simply stretched the spring out and it worked fine.
I have a second spring sitting in the ash tray so I wasn't too worried about just trying something.

 

The 6.0L injectors are a different design than the 7.3L injectors. The upper pressure limit of 75 psig is an established fact. I would not want to run past 65 psig personally, and certainly not past 70 psig ever!



Wix filters are a very bad choice. They are not made to the necessary specs. This is ANOTHER established fact. Please do the searches for yourself on this. You are very likely to have problems if you continue using them.

Ford states that you MUST replace drain and replace the tranny fluid (and the external filter) every 30k miles. Flushing the tranny with an approved HEATED machine and using ONLY Mercon SP is an acceptable practice. If you do not follow these instructions, Ford will more than likely NOT warranty any repairs - THEY DO DEMAND TO SEE RECEIPTS ON MAINTENANCE WORK THAT AN INDIVIDUAL DOES! This is also becoming increasingly common in warrantying injector repair work (ie demanding to see the receipts for the filters).

 

I want to add on what Bismic said about this. I wouldn't stretch 10k between oil changes even using synthetic as this are "high performance" engines and have to be kept up to snuff. This aren't the diesel engines of yesteryear. I would not try to compare what you could or couldn't do with the older diesel engines with the newer ones. Alot of people(myself included) learned some hard lessons about that.

This is especially true if you(self-confessed) "abuse" your truck. I would do the severe service intervals on fluid changes and I would use Racor filters.


I would strongly suggest that you re-think that.

As to fuel pressure. I'm under the thinking if 60 psi is good enough for people running 205 mm^3 injectors(I'm only running 155s) then I would imagine that it would be good enough for mainly a stock truck.

 

Pardon my ignorance but how are you checking fuel pressure separately? Most vehicles have only one gauge if at all. That would measure pressure at one location and folks are saying the pump is xx and the RR is xy. How? I'm working on my fuel system now and don't want to screw up any more than I already have. Thanks

FYI. On my 04.5 Excursion I just installed the AirDog II deleting the HFCM. Probably ordering a Regulated Return as soon as finances allow.

 

Well first off, there is no way to check this with on-board computer systems as there is no support for this sensor on the 6.0 modules, so it's going to have to be with aftermarket gauges, that's the first thing.

Now you can either run two guages, one at the point and one at the RR regulator. Have one gauge, but have it on a switch in order to swap between the pump and RR readings(think of it like an AV switcher box for having multiple AV devices going in one input source on an AV amp). Now the way that people set these things up for automotive gauges, I'm a little leary of as that means more wires and more things to trouble shoot(including simple wiring issues), but perhaps the best compromise between of all the solutions.

Or you can just have it one source(I have mine on the RR kit). Now the drawback here is that if you are getting a drop in psi it could either be the fuel pump or the RR itself, but it will atleast let you know that something needs to be looked at. This is perhaps the easiest of all the wiring installs(atleast in my mind it is, some might argue differently).

 

I know a lot of people think i am rough on my truck. But in my business there are times that i work 3 months a year 7 days a week and dont have time to do regular maint. I am liable to have to drive 300 miles to go get a 5 dollar part. The fords are the only ones i can trust to get me there and back and then be able to pull anything i need it to do. Maint. Is not on my mind when i have a machine down costing me 2500 an hour. But like i said the reason i use mainly fords is they are the most reliable trucks on the market. Its hard to kill an international motor and fords transmissions are bullet proof. I have proved a dodge cant handle it and chevys dura max worries me their front ends cant handle a heavy motor like that for too long.

 

There are times I'm right there with you. I think you are using the truck as it is designed to be used.

My suggestion to you is that you better learn to make time, otherwise it's going to cost you a whole lot more then what you mentioned in this post.

You're going to find that the 6.0(which is what you have now based on you posting in this thread) is actually the more troublesome engine that Ford/International has brought forth and if you really are going to use inferior filters and poor upkeep, your begging for trouble. It might take it awhile, but you're going to have a bad experience as you cannot treat the 6.0 the same way that you have treated previous diesel engines, regardless of the brand. I've only owned diesels, so I'd like to think I know what I'm talking about and as you can see I'm not unfamiliar with this engine specifically(based on my siggy).

Also Ford has had their share of tranny issues, just ask any of the 7.3 guys about their auto tranny in stock form. This one also as an intermediate clutch problem area as well(shifting from 3-5 specifically). The torqshift is about as bullet proof as you can get with an auto, but you still have to take care of it.

It's your money, but you are going to be in a world of "hurt" if you take on the same path as you had with previous diesels, this isn't the same animal. I don't know how else to tell you that.

 

Well i will try the ford filters and see if is better. I believe the reason ford had problems with the 6o was they sold too many to people who do not use a diesel for what is for. When i buy a new truck i break it in hauling a heavy load. Helps set the rings and transmission i think. My 97 & 06 were both broke in that way. Never been in the shop for any repairs. My 06 has 135000 miles and has never seen a dealer. Just the way i like it.