2006 6.0 shutters and misses at 50-55 mph

[dwagner3701]

I changed the fuel filters...and they were very black. This situation mostly happens when the engine is cold. If you accelerate fast it's not much of an issue. But if you are accelerating slowly it feel like it is missing when you get to around 50 mph. Any Ideas?

[itsmateo]

I am having the same problem, and can Also Feel it at idle. I'm in the same boat, if I make any headway ill let you know.

[bubba57-chevy]

Bump, any ideas on this one?


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[itsmateo]

I've been doing some reading, try searching blue spring update. I'm going to order this next week. and see if it helps..

[04PowerStroken]

My 04 is doing the same thing. I hooked a code scanner on the trucks OBD and got the no. 1 injector low circuit when I did a KOER test. When I get back to it I'm going to check my ficm and see if its putting out the regulation voltage. Ill give you an update and try to help out.

[Longhorn7807]

Normally if a ficm is bad it sets EVERY injector circuit low code, or a P0611 - Ficm performance. If you only have 1 injector code I would start by checking the resistance of that injector.

[04PowerStroken]

Do you have a link on that or shoot me through the steps?

[Longhorn7807]

First you need an ohm meter. #1 is the first cylinder on the pass side. The injector connector comes through the head just above the intake manifold, and #1 should be just behind the alternator. It will be a four wire, black round connector with a metal clip on the top side. To disconnect it you can either press the clip down(sometimes stubborn) and pull the connector off, or use a screwdriver and pop the clip up, however, keep your finger over the clip because they like to go flying when you pop them off and you never find them. Once you have the connector off hook one of your meter probes to one of the pins on the top row and the other probe to the pin directly below it, then do the same for the other two pins(see pic, you should measure resistance between pins 1 and 2, then 3 and 4)

If the motor is warm the resistance can be between .4 - 1.5 ohms, if the motor has sat for half a day or so and is at ambient temp, the spec is .4 - .6 ohms. If the resistance is out by about .2 ohms it will set that injector circuit low code, and you need an injector. I hope this helps. If you need me to take actual on vehicle photos I can do that.

[secondchance2010]

Afternoon all, I am having same problem with mine , 06,f-350 dually . But mine happens under a load , boost hits 20psi, n if i lay my foot into her , she clears up. There is a tube that runs into my air intake , it looks like a pcv setup on gassers , but i know 6.0's don't have them , any clue thanks Joe