Join Date: Jul 2009
Location: Santa Fe, NM
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2004 6.0 - Poor fuel mileage
My 2004 F350 6.0 is losing fuel mileage. I used to average 15-18MPG and now I am at 11.5MPG.
I am wondering if a weak FICM can affect Fuel Mileage. I had it go out and I fixed it using pstrangs method but the output is still only at 40v.
I have done a few mods that while I don't see how they could affect Fuel Milage I figured I'd mention them anyway.
1) EGR Delete
2) Coolant Filter
3) Ams-oil Oil Bypass Filter
4) Crankcase Vent Re-route
The Air filter is faily new.
Could a Fuel filter do this? Wouldn't a clogging fuel filter make the truck stall or buck as an indicator?
"I have suffered a great many catastrophes in my life. Most of them never happened." - Mark Twain.
Last edited by FuddleyPJones; 03-07-2012 at 06:41 AM.