Just got my truck back from the shop..sent it in for a sputter at heavy throttle. It was in a few months ago an got a new FICM but this last go round it got a new EGR valve, new cold air charger, and got the Turbo cleaned...ran like a top for a few days but now has the same sputter at heavy throttle. It seems to do it worse when its cold but still does it somewhat when warm. Its not throwing any codes that I know of..any ideas what could be causing the sputtering? And any fix ideas or things to try? Any input helps. Thanks

 

What codes are you pulling?

Details? We don't even know if you own a 6.0!

 

Sorry bout that..2005 F-350 6.0 91K miles, dual smoke stack exhaust, aem intake
.other than that its stock..not pulling any codes..no check engine light either.
thanks

 

Immediate suspicion is fuel starvation.

When is last time fuel filters changed?

Have you tested fuel pressure?

Oh.. never hurts... do a master reset as per link below..

 

Just did a full service on it about 2 months ago...how do I go about checking the fuel pressure? Ill try the reset as well. Thanks

 

There is a fuel pressure test port behind the small filter on top of the engine.

You got to have the right adapters and a gauge.

Did they change the filters at that service?

 

Yes I changed all filters when I did the service...is it possible to have codes without a check engine light on..and if so how do I retrieve those codes..also could it be an issue with my HPOP?

 

to check the hpop you would need to look at ipr, icp,icpv to start with. did you take it the dealer or aftermarket shop?
most aftermarket shops do not have the ability to diag alot of the simple things like what injector is droping out with out a code. also if they are dont have that ability then they are tossing a part at your truck based only on a code anway.

odds are you have an injector droping out, odds are its not pump related.

 

I took it to the dealer...it ran like a champ for a day or two then started sputtering again at heavy to full throttle...its not rhythmic either it will spit for 5 seconds or so and smooth out for a second then go back to sputtering...really frustrating

 

on the right valve cover is the icp sensor. its got 3 wires and is the only one there. disconnect it and go for a drive and see if it goes away. It will set a code so you will have to clear that when you are done. if the issue goes away suspect icp sensor/connector concern.
may not be it but easy to try.

 

i will try that and let you know...thanks.. also i remember some time ago i had a programmer on it and got a code for cyl 3 misfire but there was no check engine light and back then it was running like new so i just cleared the code and didnt pay it any mind, is there a way to pull codes without there being a check engine light on?

 

yes the pcm will store both codes with or with out a light, the light will only come on with certin codes.

 

do you have to have a special scanner to pull those codes? when i pulled the codes without a light last time i did it with a bully dog outlook monitor but dont have it anymore, i was just curious if there is a way i can get codes as it may help me figure out whats going on..once again thanks for all your help!

 

any scaner that can read obdII/ hs can network should pull a code if its there.

 

ok, just curious because i had a scanner on it a couple days ago and it gave me a clear reading of no codes and no pending codes.