Last post on Oct 30, 2013 at 6:42 PM
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Ford F-250 Super Duty, Ford F-350 Super Duty, Truck
#103 of 403 Re: Ford 2008 F250 Fuel Mileage [flashover6]
Sep 20, 2007 (3:45 am)
Tell them to replace your "camshaft sensor"!!!!! I have a 2008 Super Duty Diesel now with 15k miles and mileage not improving at all. Over last 5k miles started noticing the engine would not idle down form time to time and rpm's run higher sometimes when running on highway at varying speeds. Finally a month ago service light came on, took it in and they ran VIN and found a SSM on this truck for this concern to replace camshaft sensor and sure enough it fixed problem and mileage improved briefly and idling problem stopped. They also told me if this sensor went bad completely it would NOT ALLOW ENGINE TO START, hence your fix. Problem now, it is returning and come to find out dealer installed an old one in stock from prior year or earlier production so CLEARLY ford has a problem with its supplier for these CAMSHAFT SENSORS. Make them install a BRAND NEW ONE!
#104 of 403 Re: 2008 Mileage Experience From Owners [kdean2608]
Sep 20, 2007 (4:06 pm)
I got my 08 F250, regular cab, longbed,4X4,373 gear on 8/22/07. I took it home and installed a 1000lb toolbox and two 55 gallon fuel transfer tanks. I have traveled 2506.1 miles and used 190.23 gallons of fuel for an average of 13.1mpg.I have made one trip of 1242.7 miles on the interstate 70,80 and sometimes 95mph,oops! The truck computer started at 8.6mpg with 4 miles and is now showing 14.5. The truck computer mileage goes up and down with the way you are driving at the time.I have tried to be as accurate as I possibly can for comparison with my other trucks
#105 of 403 2008 Performance Drop
Sep 28, 2007 (5:44 pm)
Got my 08 350 super duty diesel, crew cab long box lariat, in July. Throtle response from a stop was awesome. Breath on the peddle and the truck would "spring" forward with no turbo lag. Towing 10,000 lb trailer was incredible, trailer and 3,800 lb slide in camper, still wonderful. truck and camper alone, great throtle response. It's was a joy to drive.
At 7800 miles that bottom end throttle response went away, now I have a 3.5 second lag before anything happens. Went to the dealer, they report all the testing showed everything was just fine. I insisted it was not they called in a Factory Service Tech. He reports after testing my truck and a new one off the lot that it is just fine. (I couldn't be there the day he was there) Went to pick up the truck They tell me nothings wrong, I ask to drive the the "test" truck, it does the same thing as mine. If nothing is wrong now, why did it have such great performance before? What changed? Anyone have an idea?? I intend to keep pursueing ford, and test driving new trucks in hopes of finding one that drives like mine did.
#106 of 403 HELP-MGVW
Oct 13, 2007 (5:58 am)
Hi: My wife and I are about to buy a slide on and we are having a hard time with the right vehicle to haul it with. I have always heard Dodge with the cummings was the best. I dont know about the new Ford 350/450 because all I read about is TROUBLE with the engine. I dont know that much about the Duramax. The camper we will be placing in the truck bed is about 5200-5400lbs when everything is said and done. My question is; will a 350/3500 be enough truock for us? We plan to go out for about 2-3 months at a time, come home for about 2 months and go out again for 2-3 months and continue that cycle. Any help would be appreaciated. Thanks Bob M
#107 of 403 WOW thats a heavy slider.
Oct 13, 2007 (8:06 am)
The only truck that even comes close to handling a 5,000 slider is the F-450. Are you sure your numbers are correct?
Ford 2008 Towing Guide
#108 of 403 2008 F-250 crew cab Door Panels
Oct 21, 2007 (6:16 am)
How do I get the door panel off of the rear door of the crew cab? Special fork tool or screw driver to pry or ??
#109 of 403 Re: 2008 Mileage Experience From Owners [buyer2008]
Oct 21, 2007 (12:19 pm)
I just made a 60k mistake, I have had my 2008 F450 for three months now, almost 3k miles. I was towing my 40 foot toy hauler with my 2006 F250 6.0L and wanted to upgrade for safety and some more power for climbing those hills when going on trips. Let me say I love everything about my new F450 BUT the fuel mileage. I have this nice brand new truck that I paid a lot of money for and I hate to drive anywhere now because the cost in fuel. I normally would not hesitate to jump on the gas with my F250, but now with my F450, I find myself driving like my mother. This truck has doubled my fuel cost a month. Here are my mpg findings. I live in a rural area, not much city driving and the best I have gotten with no load and my foot off the pedal is 9.1 mpg. Towing my trailer at a max speed of 65mph the best I get is 7.3 mpg. I have 4:88 gears and at 65mph I'm turning 2400-2500 rpm's. I wish I still had my 2006 F250!!!!
#110 of 403 Re: Problems, [mschmal]
Oct 21, 2007 (12:57 pm)
Bull S### I baby my 2008 F450 w/ 4:88 gears and only get 8mpg. My 1997 F350 4:10 gears 7.3L provided 18 to 19 mpg, 2006 F350 4:10 gears 6.0L provided about the same. 2008 7-8 mpg with no load. Please Ford, I'm a loyal customer but what the H##l. Note: In 1997 I was paying .96 per gal. for fuel. 2007 3.29 per gal for fuel. Anyone want to Buy a fully loaded 2008 F450, because I'll be selling mine!!!!
#111 of 403 Re: Problems, [bigcountry1]
by KCRam@Edmunds HOST
Oct 22, 2007 (3:23 pm)
Since the tires are close to the same diameter between your 2006 and 2008, the difference is the axle ratio. The 4.88 axle raises your rpm 19% over the 4.10... what was previously a 2000 rpm tach reading is now nearly 2400. So now, the rpm and turbo boost are up, which will cost you fuel economy.
And diesel fuel usage increases dramatically as the rpms increase. With my 2005 Cummins, I can easily get 22 mpg in my Ram 3500 4x4 dually at 55 mph/1550 rpm - at 70 mph/2000 rpm, I'm down to just 17 mpg.
The F450 also has a weight penalty with the heavier frame and suspension components. More need to keep the boost up to get all that iron moving.
kcram - Pickups Host
#112 of 403 Re: Problems, [kcram]
Oct 23, 2007 (7:58 am)
A F-450 4x4, weights 8600+ pounds,
A 2003 F-350 4x4 DRW weighed around 6900 pounds.
Yes thats about 20% difference.