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Message: [QUOTE="woodsman, post: 351667, member: 871"] So the truck has been getting crappy mileage, running hot (just going up a hill with TC locked in 4th at 55-60 mpg will easily get over 1000 degrees in the downpipe) and getting 12-13mpg where it used to get 17-19. Ran some tests last night and pulled a P1668 right off the bat, then #8 failed a CCT. After that, all injectors passed a buzz test. Started to follow the troubleshooting directions from All Data, found under 5 ohms as directed in FJ2, but then it said to go to FJ3 which requires a Breakout Box which I'm unfamiliar with? Any ideas? Truck is in my sig. Cylinder 8 also had 360 LB's of compression when the injector, icp sensor and turbo were replaced 2500 miles ago. Somebody mentioned checking for a boost leak previously, I pressure tested the intake side of things and it held pressure perfectly. Have not tested exhaust side for leaks yet.:fordoval: [/QUOTE]

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