p4-33

Hey Gang,

I've got a 2000 350 Dually with a 7.3L, 6-spd manual tranny, 4.10 axles. It has about 80k miles, engine is factory stock.

I've noticed that, even unloaded, my best mileage is 10-11mpg. Towing a 10,000lb load doesn't change mileage much; as long as I keep it under 75mph or so, I get 9mpg. Performance seems to be as good as it's ever been, and I've owned the truck since new. I used to get 15-16mpg unloaded not long ago.

Where do I start looking? Are there any engine codes to look for? Anything else that I can pull from the computer? I've never played with a code monitor, but I have access to one.

Any help would be greatly appreciated, especially with diesel fuel prices at $3.30.

Thanks in advance,
Brian

traviss

at work I drive a 2000 350 w/ 7.3, 4:10 gears. Loaded with a rack and 3 toolbox's. 90% of the time pulling 12,000+ lbs. Doesn't matter towing or not.. 10-12 mpg thats it. But it does have a diablo sport chip in the computer.. Even with the 12,000 lbs on the back it will still do a burnout



SHHH.. hint hint.... offroad diesal

mopower

Hope your boss doesn't read this

plumbers crack

I just bought a 2002 dully7.3 auto and when I picked it up the overhead console read 14.1 I have owned 3 duallys 2003,2004 with 6.0 and 2 7.3 and the milage was always 14.I towed the new boat 11500lbs friday and it went down slowly to 11.2 go figure.Now im running with no trailer and still 11.4?

waterheater

Question....is there a Ford F350 non dually or other product out there capable of towing a 98 TG, GVW around 14,000 +lbs. (boat,trailer, gas, extra crap, etc.) non 5th wheel diesel?

Outdrive1

For some reason they don't reset after a while, push your reset button after you are done towing to get your mpg while empty again. BTW, mine never reads better than about 9.something. I don't know how you guys are getting 14?????

birdog

I use a F-250..{Didnt want the stiffer springs} Air Bags,E Range tires...Good trailer with GOOD Brakes..No problem

Byrdman

yes problems...lots of them

traviss

My boss was in the truck with me.. he is a good friend.. He was impressed the ole girl could do it. LOL!

PMTCHIPS

Check us out at www.pmtdiesel.com
A Superchips Microtuner and Air Intake should help about 3-4 MPG.