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Discussion Starter #1
Last time my 6.O powerstroke was having problems it turned out to be the egr valve stuck open.
Recently my truck has been showing similar symptoms, no power above idle as well as lots of black smoke. Only this time the truck regains power after truck runs a few minutes. I did some live readings and got two egr readings when the truck was running poor and while the truck was running well. What to you make of these readings. I am leaning toward the valve is going bad.

egr err % 91.4

egr err % -100.00
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