6.0 Powerstroke Guarantee Brain buster!! - Ford Powerstroke Diesel Forum

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post #1 of 14 Old 05-08-2013, 03:29 PM Thread Starter
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6.0 Powerstroke Guarantee Brain buster!!

Year: 2004
Make: Ford
Model: F350 SuperDuty
Engine: 6.0L
Miles: 150K

This machine is beyond me now.. Here is the problem!

Injector 2, 4, and 6 are all misfiring when accelerating . Giving it a real bad (lag) (shutter) Loss of power whatever you want to call it. Thats the case when you drive the truck like a normal person. When you push the petal to the floor it has nothing until you hit about 30mph and BAM takes off like a rocket and acts like nothing is wrong. I know something is going on with those 3 injectors from the live data stream i was running. When i gave it a little throttle those 3 injectors line graphs would spike down instead of climbing like all the other injectors. Here is the Brain busting part.. Here is a list of all the new parts put on this truck. (all parts within a week)

-Turbo
-EGR
-EGR Cooler Gasket set
-FICM (newest flash done by Ford)
-ICP
-IPR
-Both Fuel Filters
-Fuel Pressure Regulator
-#2,4,6,8 Injectors
-Intake Manifold
-Intake Manifold Gaskets
-EBP Sensor
-Intake Temp Sensor
-High Pressure Oil Pump Gasket set
-Main Engine Harness
-Injector Harness
-Thermostat

I think there is some more stuff but this is what i can remember off the top of my head. The voltage to all the sensors is correct, as well as fuel pressure.
Anyone Want to melt their brain thinking this one over with me?

also oil is fine, oil type is fine, oil pressure is fine, fuel is fine its none of those...

Interested to see what you guess come up with, Thanks in advance!!
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post #2 of 14 Old 05-08-2013, 04:14 PM
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If your getting contribution codes for those cylinders and the injectors have been replaced then run a compression test on all cylinders in that bank.

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post #3 of 14 Old 05-08-2013, 04:40 PM Thread Starter
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Quote:
Originally Posted by Tuscany View Post
If your getting contribution codes for those cylinders and the injectors have been replaced then run a compression test on all cylinders in that bank.
Im not getting any codes at all. as far as every sensor and control module on the truck thinks, the truck is running top notch. but clearly its not.. I beleive we ran a compression test on all the cylinders but i will have to double check in the morning.
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post #4 of 14 Old 05-08-2013, 04:46 PM
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Check the injector harness as well for chaffing or shorted connections and loose connections on the injectors themselves.

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post #5 of 14 Old 05-08-2013, 05:23 PM Thread Starter
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Quote:
Originally Posted by Tuscany View Post
Check the injector harness as well for chaffing or shorted connections and loose connections on the injectors themselves.
It has Brand new wiring harnesses on it, Engine harness and injector harness.. all connections are good.
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post #6 of 14 Old 05-08-2013, 05:30 PM
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Did you check the pins on the FICM to make sure some aren't bent and not making contact?

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post #7 of 14 Old 05-08-2013, 05:31 PM
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Did you pull the allen head plug on the back of the head and turn on the lift pump, maybe there is junk in the fuel log inside the head. Any evidence of that when changing injectors?
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post #8 of 14 Old 05-08-2013, 05:34 PM
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Also is it the old style oil log or the new manifold style 04.5 up?
The oil is fed from the rear, so maybe there is a restriction, and enough oil for number 8 only.
In either model icp is on right rail, or by oil pump so the computer would not know that there was not enough high pressure oil to fire those injectors.
Did you pull dummy plugs and check oil flow when injectors were changed.
Just kinda listing wierd scenarios here

Last edited by cfd_shop; 05-08-2013 at 05:40 PM.
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post #9 of 14 Old 05-08-2013, 08:57 PM Thread Starter
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Quote:
Originally Posted by cfd_shop View Post
Did you pull the allen head plug on the back of the head and turn on the lift pump, maybe there is junk in the fuel log inside the head. Any evidence of that when changing injectors?
none, all the fuel lines are great. I didnt pull any plugs on the back of the head but i can check them tomorrow. i know when the injectors were replaced we made sure there wasnt anything restricting any lines and each injector was getting fuel.
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post #10 of 14 Old 06-03-2013, 06:56 AM
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Anyone else thinking maybe he got a few bad injectors? I know I've replaced a set on one of our fleet trucks and 2 were bad from the ford dealership.

Work Horse
2006 F250 FX4
6'' Lift Donahoe Racing
Toyo ATII's 35x12.5R18 on Moto Metel Black
BPD Engine Oil Cooler
BPD FICM 53V
K&N CAI
4" Straight Pipe
XDP Coolant Filter Kit
Blue Spring mod
SCT Tuned by DP-Tuning
ARP Head Studs
Nothing But AMSOIL!
To-Do list:
FICM Tuning By PHP
155cc or 175cc Injectors
Stage 1 or 2 Turbo
BPD Water Pump
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