Okay so if I'm repeating a question sorry in advance. My 06 cummins has 93000 on it and is all stock. Before I was getting around 550 miles to a tank and now I am getting 338 miles to the tank. I don't drive it hard I drive it like a grandpa. It also feel like it has a lack of power. I put the snap on tool to and pulled a P0708 TRS. Also I was looking under the hood at the lines my number 1 fuel line is vibrating and you can hear a ticking noise. I did a kill test on each one a everything passed. Could it be the injector? It seems to be running fine. It's just eating the fuel and lacks a little power.
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