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Message: [QUOTE="ford_muscle1, post: 1232059, member: 18606"] So a couple weeks ago my truck went from getting 15 mph on the regular to all of a sudden I can't get better than 10 mpg. I'm really not sure what is up with it. It also started making a different turbo whistle about the same time. It still has the typical 6.0 whistle but now it has a strange secondary whistle. The truck went to a ford dealer to have a injector nozzle replaced and the Ecm and FICM updated with the current flash. So now that leads me to this. Since my truck is under warranty they only replaced 1 injector nozzle and I'm afraid that another will fail soon and do not want to be sitting along side the road until the replace all 8 so I figured I would buy injectors and replace them all at 1 time and be done. I was looking at Warren Diesel 175 with stock nozzles and 175 with the upgraded nozzles. What is the biggest difference in them? Also is Warren a good company with a good product? Now getting to the turbo I was thinking about getting a Garrett Powermax to upgrade the turbo and hope the weird whistle goes away. Now would that be a good match for that injector setup? The truck only has 90,000 on it and has been head studded. [/QUOTE]

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