I got a 04 f350 im working on for a buddy. Just got it to shop late last night havent even had chance to hook scan tool up. But he just had new set of alliant injectors put in. Said it run good when first got it back an said ran it low almost out of fuel one night an its been running crappy ever since. Spits an misses bad on bottom end, an kind of clears up on top end but still doesnt run like it used to. Truck has innovative sct intake exhaust studs an egr delete. Any ideas?

 

Running these trucks out of fuel is terrible and very hard on the injectors. Doing it once or twice in it's life... probably not going to be the end of the world. Ford says anything under 45psi of fuel pressure is doing damage though, and running it out surely went well below that for a while. Might just have air in it. Should bleed itself back out though.

Who did the injectors? One or more of them might have even loosened up. Could be a bad o-ring on an injector, a copper crush ring not seated right... lots of possibilities. The most info you can give will only help here...

I would hook the scanner up though and let us know what you find.

I would also put it back to stock tuning for any diagnostics work. Get that figured out first, then re-load the tune and try again.

 

Another shop did his injectors. he uses it for farm work, always has a trailer behind it. I is having me put a fass an sump on it while i have it. SHould i do the blue spring an 6.4 bolts as well?

 

If you want... I don't see why any of it is needed. Of course the magical question is... What's the fuel pressure now? Fuel pressure is #1 most important gauge for a 6.0, and only becomes more important, the more fuel you throw at it... IE, tunes, then bigger injectors etc...

Where did the injectors actually come from? Right from the Ford counter? I'd be curious to see where those came from, most "reman" injectors for a 6.0 are just junk. I can count on one hand the places I'd buy 6.0 injectors from, and one of them IS the Ford counter.

 

Like mdub said fuel pressure is key, but I would check pressure then if its low switch out for the blue spring from the dealer its cheaper then buying an airdog

 

The blue spring is in no way a replacement for the airdog however. Each serves a different purpose. Blue spring raises pressure, but doesn't fix a volume issue, that's that the airdog is for.

 

i have a fass 220, sump, blue spring, an 6.4 banjop bolts to put on

 

Sweet!

Hopefully a fuel pressure gauge is on the list of fuel system improvements, otherwise most of what you're doing is sort of pointless.

 

Finally got codes, P2269 water in fuel, P2169 Iat sensor, p1029 ICP above desired, P0603 internal control module KAM error, P403 egr circuit fault, P405 EGR a Circuit fault, P0341cam pos sensor performance, P0046 tc/sc boost solenoid circuit performance.

 

I would start by pulling the IPR valve and inspecting that. Are the injectors the only thing that was done?

Can you monitor ICP desired and ICP actual, as well as IPR duty cycle?