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    Well, now I know why it was running rough...

    I bought it at 184K and mistakenly assumed they'd been keeping up on such things. Yes, the oil has been changed on schedule--at least since I've owned it.
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    Well, now I know why it was running rough...

    Answer: 195K miles.
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    Well, now I know why it was running rough...

    Check out this spark plug. All eight were pretty much the same. https://www.dropbox.com/s/y5agjdfmxefa1g4/plug.jpg?dl=0 Any guesses on how many miles were on it? Also, if you Expedition seems to accelerate decently but has a hard time when coasting--it might be the spark plugs.
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    The "Check Charging System" warning that won't go away...

    SOLVED! Hamfisted was correct, I did buy the alternator from Advanced Autoparts and... that was the problem. I ended up taking it to the local shop (Northwest Brakes and Undercar, Happy Valley, Oregon) and it was a puzzle for them until the looked up the part number of the alternator. The...
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    The "Check Charging System" warning that won't go away...

    Update, I pulled the alternator out again (by the way, is there a way to get it out without taking off the radiator hose and spilling some anitfreeze) and checked the three-pin plug, blew it out with an air compressor, reconnected, and confirmed the positive voltage connection was nice and...
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    The "Check Charging System" warning that won't go away...

    Where is that fuse box? It isn't the one by the foot of the passenger side door is it?
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    The "Check Charging System" warning that won't go away...

    (2006 Expedition, 194K miles) A few months ago, I got my first "Check Charging System" error. It would come on intermittently, and go away when the engine revved up. I took the alternator to the shop, surprisingly, it tested "OK." The problem went away for a while. Recently it came back, only...
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    Help, california is insane, mpg mods needed

    When I lived in California, I rode my bicycle a lot more--that was back when oil was around $100/barrel. Even in the IE (area east of LA) it was cool enough in the summer mornings to ride to work. Riding home was scorching though.
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    Engine went into Failsafe, restarted, now grinding sound?

    This is going to blow my my maintenance budget out of the water. Throttle body, front diff, brake fluid change, rear diff fluid change, transfer case fluid change. All add up to over $1800.
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    Engine went into Failsafe, restarted, now grinding sound?

    Whelp... front differential had a small leak. Over time, all the diff. fluid leaked out. The shop found one for me at a junk yard with 101K miles on it and I gave them the go-ahead to swap it out.
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    New head unit, now sub "thumps" when turning on...

    Thanks guys. I'll check the power connection, it may be going to the switched line.
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    Engine went into Failsafe, restarted, now grinding sound?

    Thanks. It is in the shop now. Report is that the engine failsafe mode was due to a throttle-body failure--not related to the grinding noise. As a matter of fact, the grinding noise was much harder to detect this morning, and at the shop they couldn't reproduce it. Maybe it is something that...
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    Engine went into Failsafe, restarted, now grinding sound?

    Thanks. Yes, it is a 4WD. Never had any shifting problems.
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    Engine went into Failsafe, restarted, now grinding sound?

    2006 Expedition Limited w/ 187K miles. Folks, Yesterday I was driving down from Mt. Hood after skiing and using the O/D on/off occasionally to decelerate on the long declines. One time, on the flat, when I turned the O/D on the engine went into failsafe mode. I shifted into neutral, the...
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    New head unit, now sub "thumps" when turning on...

    Thanks. I'm pretty sure I already have it off, but I'll confirm that.
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    RockAuto.com - Order Parts and Pay 24 Hours a Day…with Cash!

    That's pretty cool. I haven't seen anyone else do that.
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    Hello from Portland, Oregon. 2006 Limited

    We bought a 2006 Limited with 186K miles after a druggie in a stolen car ran a red light and totaled our minivan. This is our third Ford. We previously had a '97 Explorer AWD and currently have a motorhome on an E-450 chassis. So far I have installed a new head unit and a back-up camera and...
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    New head unit, now sub "thumps" when turning on...

    Good to know. Thanks.
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    New head unit, now sub "thumps" when turning on...

    I just put a Pioneer AVH-1440NEX head unit in my '06 Limited to get CarPlay and a backup camera. Most things work well, but a few seconds after I turn the key on (and the head unit powers up) the sub "thumps" once--kind of like when you plug something into an amp that is already on. I'm...
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    Subwoofer Amplifier Installation

    Wow GAIN-MOB, that is an incredible install. What alternators did you put in there and how did you mount them? Also, what have you got for batteries/capacitors now?
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    5.4L Fuel Injector O Ring In Spark Plug Well

    Wow, so it just came flying out with air from an air compressor? Nice.
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    Show me your Brake Controller installations

    I bought my '06 with one already installed. They had screwed mounting brackets right above the OBD connector. I'd take a picture, but I already took it out since I don't need it.

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