Turbo Bark - Sudden Loss of Power - Ford Powerstroke Diesel Forum
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Old 03-10-2010, 02:57 AM
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Turbo Bark - Sudden Loss of Power

My truck is a 2004 F350 4x4 dually. When I'm making a hard pull I often hear the Turbo Bark (turbo boost blown out the air intake box) and have a momentary complete loss of power. This happens when I'm unloaded and going up a steep grade, or if I'm pulling my trailer loaded. I also notice that my boost gauge will be reading in the high 20's and sometimes 30 psi when this happens. It doesn't seem normal to me. Any ideas what may be causing this?
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Old 03-10-2010, 04:30 AM
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Could be the computer pulling power for some reason. Perhaps a sensor that's reading outside of the normal range.

Is your truck stock? Tuned? How many miles? The more you tell us, the more we can tell you.
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Old 03-10-2010, 04:36 AM
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there are a few threads on this...it will probably be your EGR valve. cleaning it will fix it temporarily. everyone that replaced it had success. i will be replacing mine tomorrow, waiting on the part and the day off. i will be posting a reply on one or two of the other threads to help out as many people as possible. this is a great site and we can all benefit from each other's experience. search for 6.0 studdering, 6.0 ex coughs, use different descriptions in your search and you will find some of the success stories. good luck
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Old 03-10-2010, 05:22 AM
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Here is some more info about my truck. I bought it used a few months ago. It has 97,000 miles. The only thing I have done to this truck is change the oil and fuel filters. I also had to put a new thermostat on since the engine never did get up to operating temp when I bought the truck. I don't know the history of this truck but I have noticed a few things.

1) The air intake box has been removed and replaced with an aftermarket filter and filter box.
2) The exhaust has been changed. It has a 4" pipe from the Turbo to the tail pipe. The muffler and cat look to be aftermarket as well.
3) There is an aftermarket heads up display gauge with digital readout showing boost, exhaust gas temp, rpm, etc.
4) The truck came with a tuner that holds 5 hp programs from +50 to +150 hp. It is the TS Performance 5x loader. I read the manual and set the tune back to stock.

Last edited by DirtyEC; 03-10-2010 at 06:21 AM.
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Old 03-10-2010, 11:27 AM
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Its typical with a VVT. Cales tunes on a SCT cured mine 99% of the time.
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