I have an '04 F250 with the 6.0 About 2 years and 45,000 miles ago I installed a set of pensacola diesel 40hp injectors with all the usual goodies. This summer I installed a Swamps billet FICM with the 58v mod and the 50hp flash tune. My truck has 206,xxx on it. The truck runs a bit rough til its completely warm. When its real cold the truck will lope moderately and run a bit off. Once its warm all symptoms disappear after 5-10 minutes and the truck reaches running temperature. The truck will also slightly buck or miss in higher gears at low rpms under load. Its most evident in 4th or 5th at 1500-1800 rpm when givin her some pedal it will miss or buck a bit. I've done fuel filters every 7,500-10,000 miles since I've bought the truck, never run sketchy diesel in it, and always run some sort of an additive. I'm looking for some insight on what this could be causing this problem.

I have no check engine lights, no blue or white smoke, and no other symptoms other than the running issues.

Things I'm thinking it could be?
-An injector or two out (I now see pensacola has a hit and miss reputation)
My scanner doesnt data-log so I would probably have to pay the stealership to look and see if I have an injector on the fritz
-ICP sensor?
-Fuel pressure regulator

I guess theres a list of things that could be causing these symptoms.

I'm just looking to see if theres anybody whos run up against these symptoms at all... or some advice as to what steps you would take to go diagnosing this.

I'm a college kid with relatively limited funds and a good deal of technical know-how so I'd like to avoid the dealer if possible.

Also, can anybody recommend a good fuel pressure gauge (the service technician type not the a-pillar mounted kind ) I believe that should be one of the first thing I should start with and see if im ever dropping below that magic 45psi.

Any tips or info would be much appreciated fellas!

 

check your wires going into the back of the FICM out, make sure they are in tight and wires are in good condition.

if not, id lean toward an injector issue

 

Sounds like a good start haha... I'll give those wires a check as soon as I pull the truck in tonight!

 

you proly should check the FICM voltage while your at it... just to be sure

 

A few things...

not sure what a billet FICM is... but I am aware of Swamps 58V units, the tuning is done by Innovative.

Pensacola doesn't have a hit and miss rep, they have a miss rep.

You put in "larger" injector of some unknown size (HP rating means nothing), how are you controlling anything? What tuning are you using? Who's tunes?

Larger injectors and no fuel system? A hot tune on stock injectors is usually enough to drop well below that 45psi number.

Your issue just sounds like sticky injectors, try some Rev-X. PM Sunsetsky on here for some. Works like magic.

 

I did that about a month back and all was good, but ill give it another check while im under the hood!

---AutoMerged DoublePost---

Mdub, I realize that now that Pensacola was not the route to go .

I do not have anything else major done to the fuel system. I am thinking of going FASS II when I get the coin together.

I believe that was a typo on my part on the billet 58v FICM for some reason thats what I thought swamps called the 58v with the flash on it, but I could be wrong.

As far as tunes go, Im working on getting some from innovative. (My tuner is back with SCT getting the screen replaced because the backlight went out)

I do have that spring to put in the fuel housing, not sure if that will help any.

I'll get some rev-x coming asap.

Anything else you would recommend to get the fuel system up to par?

Thanks

---AutoMerged DoublePost---

The tune the truck is currently running is the SCT canned tow tune.

I want to get a package from Innovative, but im thinking ill get gauges at the same time so I've been saving up haha

 

If you are only having cold starting problems, it could be that your FICM tuning is using the Non-Inductive Heating strategy as a base. You'd have to check with Swamps or Innovative to be sure, though. In any event, Rev-X will certainly help.

Take care.

 

It's hard recommending a decent fuel system without knowing what the heck injectors are really in there... 40hp means nothing to me.

Start with some Rev-X. Put your fuel spring in, and most importantly, put a fuel pressure gauge on it, this will tell you exactly what you need to do with your fuel system, if anything. Without a gauge, you have no idea what pressure is and could be killing your injectors.

I would also definitely get custom tunes to match the mods you have.

Might be a good idea to check with Innovative on the tuning for the FICM too, like Bill suggested.

 

I'll get that Rev-X on the way, get that spring in asap and call up the guys down at Pensacola and see if I can get more information on the injectors. Once I know a little bit more I'll get some custom tunes on the way and see if I can get it all straightened out.

Thanks for the help fellas!

 

Don't forget a fuel pressure gauge... every 6.0 should have one, and if you're running larger than stock injectors you NEED one. Low fuel pressure is #1 injector killer on a 6.0.