Last post on Jun 20, 2012 at 5:56 AM
You are in the Ford Expedition
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Ford Expedition, SUV
#41 of 50 Re: Quest for better MPG [buffalojoe]
Jul 14, 2009 (5:52 am)
The manual says to replace plugs at 100,000 miles. When I measured the old plugs the gap was almost 1/8", pretty big and plugs were worn to some degree. I would say the engine runs better, smother with the new plugs, idles just great. You can do the plug job but take your time. If plugs have never been replaced and you are at the 100K mark do it. Also you may damage wires so consider replacing them at the same time. The plug wire boots are quite long and were difficult to remove without damaging them. If not up to the job, let the dealer do it. I did the job over a two day period to ease my back from bending over those fenders!
The Generals HTS seem to be quiet, smooth riding and handle well. I do mostly street, hi-way driving. Check the Tire Rack site for reviews on them. These tires were so new when I got them, my garage smelled like fresh rubber for 2 months! I think i paid $550 for 4 balanced and installed at Tire Rack here in South Bend, IN.
Let me know how you did on the plugs.
#42 of 50 Re: Quest for better MPG [harborharley]
Jul 23, 2009 (9:35 am)
I finished the plugs over the weekend and it took me a total of 7 hours (2 hours one night after work and 5 more in a straight shot on Saturday). I don't have the angled socket extenders so I was splayed out over the engine with the ones nearest the firewall. What a pain. The interesting part is three of them had corrosion on the higher part of the threads and the nut. I'd never seen that before on any of my vehicles. I have the 5.4L with coils but none of the rubber looked damaged enough to leak. I don't see any white smoke so the head gasket must be okay. It's a bit weird, though.
The plugs looked as if they were wearing normally. There wasn't any fouling or anything that appeared out of the ordinary. We'll see if this helps the mpg.
#43 of 50 Re: Quest for better MPG [buffalojoe]
Jul 23, 2009 (6:00 pm)
Ok on doing it yourself. I may have taken 5 hours total, I forget now. How was the plug on the passenger side rear? There have been some problems with the threads on the head on some 4.6 engines. This plug has actually blown out of the head in some cases. I did squirt some WD40 in the plug holes before I tried to remove them. I think I let it sit over night and soak in. Anyway good deal, you saved some money doing it.
As I mentioned with 90K miles on mine the plug gaps were way out of spec, much opened. I have a 99 Expedition and it's almost show room condition! I get around 17 to 18 mpg on the hiway conservative driving.
Jun 15, 2008 (7:59 pm)
Thinking of getting a 2005 Eddie B Expedition, with the 6.0 Liter diesel. What kind of mileage can I expect to get city.highway? Will it be comparable to what I get with the F-350 Dually long bed Crewcab with the 7.3 Liter? Both are 4x4 with automatic transmission.
Thanks in advance.
#46 of 50 Expedition with Diesel?
Jun 21, 2008 (7:58 am)
Dude, no Ford Expedition has a diesel.
Do you mean Excursion? maybe up to 15 mpg.
#47 of 50 Fuel consumption when idling?
Apr 23, 2010 (11:11 am)
I have a 2007 Expy EL 5.4l 2wd. I just filled her up and calculated that she's only doing 11mpg average (fairly good mix of city/hwy). I reckon it's low because of lots of idling. Does anyone know how much fuel is burnt per minute idling with the A/C running on coldest setting? Does a/c fan speed affect it, or also having rear A/c on?
#48 of 50 Re: Fuel consumption when idling? [exbdishin]
Apr 23, 2010 (3:21 pm)
I have had three 5.4's, all with 3.73 rear gears. Always ran around 14-15mpg. One of my current Exeditions has 130k on the clock and the mileage had dropped to around 12mpg. I did the plugs and Sea Foamed it, and it is now around 15 again. I haven't run a lot of tanks through it yet, but my sense is it may even be higher. I never found idling or AC use did much to it.
#49 of 50 Re: Fuel consumption when idling? [exbdishin]
May 11, 2010 (6:03 pm)
My 07 Expe standard length EB 4x4 gets around 14 mixed and 17 hwy. It will get down into the 11s in the winter and when I idle a lot. I'd guess a v8 with a/c on will burn close to 1 gallon per hour with a/c on. Fan speed should matter to much. The a/c compressor is the biggest drag on the engine. Idling kills gas mileage for sure.
#50 of 50 MPG in the 2008 vs. Later Models Expeditions?
Jun 20, 2012 (5:56 am)
I recently bought a 2wd 2008 Expedition and the stick FE is 12 city and 18 hwy. That is the same for 4wd. In 2010 the 2wd Expedition got bumped up 14 city and 20 hwy. I can't see there has been any changes from 208 to 2010. Can anyone explain why the 2008 2wd gets the same mileage as the 4wd where in later years the 2wd gets better mileage?