Long term fuel trim question
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Long term fuel trim question
I have a 01 f250 v10 4wd with 250k miles. I recently bought a ultra gauge plus and I have been watching my stft and Ltft along with temps. Since having it, I have found and replaced all vacuum rubber lines under hood and made huge difference in way truck runs.I just replaced the fuel pressure regulator and after that my stft has been with 3+/- of 0. Previous too all work being done, was running pretty lean. The o2 sensors are new, spark plugs replaced year ago with motorcraft platinum and recently did coolant flush. Truck has aftermarket y pipe and no cat with new walker oem muffler and turbo muffler to get rid of Honda civic sound. It idles great and runs great. What could be the cause of the higher long term fuel trim of b2. Ltft b2 is usually double what Ltft b1 is unless WOT then stft and Ltft goes 0.00. Normally b1 is 3.xx, 4.xx, 6.xx and b2 will be double those numbers.
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Cross-Country
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I rechecked spark plugs and found i had a loose one on drivers side. It had a save a thread in it, so I replaced it and set it in head then replaced all 5 spark plugs on that side. Made a improvement, but still have a difference in reading. Could this be caused by a injector stuck open or partially working? All plugs looked the same.
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Thanks for info. I have been driving it and enjoying the extra response in throttle from work I've done. Just wanted to make sure truck is running without issues, about to be driving it alot more then 20mins a day.
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