Had the flight recorder on for the 2nd time and it shows nothing, suppose to show 30 sec. before and the same afterwards when you push the button.
Truck has the pow-pow when letting off the pedal, now has the pow-pow when pulling a hill, hit button and didn't show anything, also 2-3 inches of dead peddle and low RPM., 1500 rpm with peddle all the way down then after about a quarter mile it acts like something opened up and truck will start running 1/2 way normal. 2 night ago was on interstate and truck wouldn't run over 70 mph, peddle all the way down, acted like it was against the govener, done this for about a quarter mile then just took off like everything was OK.
I am on my 3rd turbo and everytime they change it the pow-pow goes away for 3-6 thousand miles then starts all over again, letting off and under power both. When truck is pulling and the pow-pow starts it jerks and acts like a miss and tach shows a problem, also NO engine check light. Flight recorder shows none of this, doesn't seem to matter if engine is cold or normal temp.
Waiting on engineer from Ford 03-6.0 built4-28-03, major amount of problems

 

Did they ever check for wire chafing? Here is a Ford bulletin:

Wire Chafing Issues:
A variety of driveability issues can arise from chafing/shorting wiring, such as crank/no-start, stall, running rough, misfire, buck/jerk or lack of power. The most common location for this is the valve cover/cover bolts near the FICM or the intake manifold bolts where the harness routes under the air intake hose. The harness should be rerouted and any chafe points insulated with rubber vacuum caps. Other chafe problems can occur where the sensor harnesses route around the valve covers, thermostat housing, idler pulleys, glow plug relay bracket, and near the accelerator pedal assembly (adjustable pedals), and also near the PCM by the battery and near the relay box brackets at the left rear corner of the engine compartment. On Econolines, also inspect at the top edge of the computer, along the oil dipstick tube bracket and auxiliary A/C lines. Broadcast Messages 1407 and 3077.

 

I would hope that was the first check

 

i wounder if it could be carbon build up causing the variable vanes of the trubo to stick?

 

The VGT actuator is oil pressure driven. Dirt or incorrect oil could cause the actuator to stick and not move the vanes.

 

When I got mine apart, both sides of the cam plate were COATED in carbon...I could see this being an issue.