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    Codes p0174 and p0401

    both code causes could contribute to bad mileage, the EGR cleaning is simple as described above, hunting down the vac leak (which is likely the larger contributor to bad mileage) is hunt & peck. Vac hose replacement is probably best using aftermarket stuff rather than wasting time trying to get...
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    HELP!!! DIY 100% 71 yr. old disabled Vet ,looking to replace brittle vacuum hoses. Ford discontinued hoses per dealer, advice what to do..

    Drip irrigation line makes a good substitute for vac line. You may need to glue on a fitting, for that I use FlexSet epoxy which hardens to a still somewhat pliable state and sticks to practically anything. For sticking to polyethylene the poly needs to be kissed w/a torch flame first (just...
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    Help my mpg is an 8 mile drag

    Mine was stuck in 4Lo but no indicator, that was easy to diagnose on the freeway, req'd chane out of the xfer-case gear change motor. @ 167k I changed spark plugs with a nice boost in mileage (12 or less to 16-17) & utter smoothing out of misses at idle (probably original plugs way overdue)...
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    2001 EB lift gate.

    There are 2 cables that wear out, 1ea door & window, not expensive (rockauto.com), access like jr1under said
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    Electrical Gremlins

    Diagnosing a bad electronics box is a process of elimination. Start w/basic battery connections & assure there clean & tight so you have full voltage into the system. Invoke something (say turn signal) that isn't working & make as complete a list as you can: switch, wire terminals, wire...
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    Letts alk about PATS

    A new battery at 12.5 run 15mi on a new alternator that ends at 12.4v is not right. I'd conclude a problem with charging, bad new battery or bad connections which you seem to have eliminated. Also, 12.1 after 2 days indicates parasitic draw or a bad battery. I got tired of batteries dying...
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    Battery charge and recommendation

    Small looking parasitic draws kill a battery quickly. I have 2ea 950cca batteries in my motorhome and 1.6A parasitic draw puts them in trouble state in 3-5 days
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    mechanic wants me to get rid of expedition

    Get a better mechanic that doesn't think he owns you and will fix things when asked. Pretty sure the 1/4 gauge statement is b.s., that's what the red gas light is for
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    The original owner 2004 Ford Expedition E.B 5.4. It is struggling to Accelerate and it's bad!! HELP!!!

    You had p301 & p308 misfires on respective cylinders, I didn't see that you replaced boots which can crack & bleed spark away
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    1999 Expy 5.4L v8 throwing multiple codes, help please!!

    For the amount of labor to change all plugs, cost of new boots is minimal & they get old & misdirect the spark, so IIWMI'D change all boots when doing plugs. Coils are expensive & fairly reliable but they go bad also on occasion, so before changing coils U can swap existing coils to see if a...
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    99 EB Air Suspension Questions

    Ditto what brillis said, best thing i've done, massively improved the ride. If I was doing it again I'd go Bilstein on the rear, but coil springs instead of the bags for sure
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    Rusted brake line

    1. No reason Gravity Bleeding shouldn't work tho haven't tried it on the Expy. Works on my diesel motorhome 2. IIRC Harbor Freight has a small hand pump vacuum bleeder device (or maybe I saw it elsewhere) for a single handed job to make it go quickly
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    Suspension

    I went coil springs rear & coil over shocks up front a few years ago, dramatic upgrade, maybe the most vivid response improvement to any rig i've owned in my life. I can't say it sticks to the road, I'm guessing I need sway bar bushings at 175k, but the coil suspension makes it a dream compared...
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    Updating my sloppy suspension

    My '99 did a weird flop-over thing where part way thru a turn the body roll angle would shift suddenly & lean farther out from the turn which changed the steering response. It was unnerving. At 160k the rear bags were shot. I replaced with cool springs & Monroe shocks rear (IIRC it was an...
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    2017 Expedition Positive Battery Terminal

    I haven't had this issue w/my 99 Gen1, but had the same problem w/2012 Nissan Frontier, positive post corroding ridiculously & killing a bank of fusible links bolted to the +term. Battery sensor is 3-wire type w/a CT coil wrapped around the negative cable. Charge voltage was variable starting at...
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    electrical issue

    I had that on a '76 Ford F250, IIRC was a bad ground in the dash. One turn signal ran the horn at the turn signal cadence & other random crosslink stuff.
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    Cylinder 4 misfire plus EVAP System Monitor and Catalyst Monitor won't complete cycle

    Its strange that there is no code for the catalyst trip cycles not completing, I get that on my Nissan (code P0420) for an upper ox sensor that isn't reporting (assume it would be same for lower ox sensor that is also involved in the analytic to assess cat efficiency). The ox sensors report to...
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    2004 Expy, Crank, No Start. No fuel pressure. Internal Relay seems fine. Inertia switch not tripped. Help!

    I had a similar problem on a Nissan, battery leaked enough to corrode into fuse link wires attached to positive terminal. Sometimes 12V, sometimes not enough volts to power either the ecu or a smart relay/ fuse distribution unit. Dealer replaced both. Eventually they replaced the corroded wiring...
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