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  #1  
Old 11-19-2012, 05:09 PM
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battery light

Been having a problem with the battery light on my 05 6.0. Went put to start the truck this morning and it was completely dead. Then got new batteries started the truck then unhooked both hots while it was running and it stayed going. Seemes like the alternator is good beings it stayed running. So what could it be?"
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Old 11-19-2012, 05:35 PM
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Hey redneck, I would refrain from disconnecting the batteries while it's running, good chance to damage components. You can bring it to a parts store to get the alernator tested correctly with a load on it...........

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Old 11-19-2012, 06:01 PM
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I only done it long enough to see if that was the problem but I really don't know what it is because it stayed running. Seems like that alternator charges but idk if good enough.
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Old 11-19-2012, 06:02 PM
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Can they check it on the truck or do I.have to take it out?
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Old 11-19-2012, 06:08 PM
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Take it out. Preferable a shop that fixes alternators and starters, but oreilly will do it. I never trust autozone personally.

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Old 11-19-2012, 06:16 PM
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Alright there's a shop around town that tests them. And I know this is off topic but what do you think about bad tuning like I get pretty bad mileage I think. The truck has egr delete powermax turbo injectors intake studs and a coolant filter also it did have an sct program on it but I don't have it. I just went from a 96 OBS 7.3 and the mileage seems pretty bad I beat on the 7.3 hard and it got better seems like
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Old 11-19-2012, 06:24 PM
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I do not have tunes, tuning with later strategies apparently is not the best for fuel mileage. I also have a 96 7.3, the 6.0 is a whole different monster.....lol. Make sure you are monitoring, a bad ficm, sticking egr, dirty filters, dirty oil, sticking brakes, sticking unison ring, late ecm strategies, and low fuel pressure just to mention a few, can cause bad fuel mileage.

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Old 11-19-2012, 06:27 PM
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I just changed the oil to 5w40 rotella t6 and the oil filter I may need to do the fuel cuz the oil needed to be done bad.
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Old 11-19-2012, 06:30 PM
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Make sure you are using motorcraft filters with matching caps........good video........http://www.dieselfiltersonline.com/f...k-filters.aspx

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Old 11-20-2012, 04:36 PM
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I only use motorcraft and I wanted to ask would a powermax turbo cause a drop in mileage due to not correct tuning?
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