terrible mpg - Ford Powerstroke Diesel Forum
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post #1 of 9 Old 12-03-2011, 02:57 PM Thread Starter
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terrible mpg

went from 17 mpg to 12 mpg. air intake is clean. what now?
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post #2 of 9 Old 12-03-2011, 03:23 PM
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How did you calculate mileage? Hand calculations or computer? How did you have the truck a year ago? It could be "winter fuel" causing a drop. Not sure about 5mpg though.

Alan
2000 F-350 CC LB DRW 4x4 XLT Auto

- Intake
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- ScanGauge
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post #3 of 9 Old 12-03-2011, 07:07 PM Thread Starter
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Fig milage both ways. It's been going on for months. Only change I can think of is that I had to replace fuel injector module. Or at least that is what ford dealer said they did.
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post #4 of 9 Old 12-03-2011, 07:36 PM
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What truck you got? Mods. Info Info Info.
Brakes dragging, low tire pressures, and the list goes on. Not that simple to just say what it is, but it could be a simple fix.



2000 F-350 Lariat Super Duty, Dually, CCLB, 7.3L
4R100, 2wd
330,000 + miles
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post #5 of 9 Old 12-03-2011, 07:56 PM Thread Starter
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F 350 dually w 6.0. No drag and just put new tires on.
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post #6 of 9 Old 12-03-2011, 07:59 PM
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Well if you got a new FICM then they probably re programed your truck to a new . Bam Worse mpg


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[CENTER]2012 King Ranch
22k deleted at 1k
5" FLO-PRO
S&B Intake
Sinister Egr Delete
MiniMax/ SPE Tunes
466/953 on 37's
6" 4 link
37's on 22's
Bags and compressor
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transfer tank tool box.
9" 2" poly boss v blade
Should have kept my 6.0.....
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post #7 of 9 Old 12-03-2011, 08:11 PM Thread Starter
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How can I reprogram FICM without taking it back to dealer? I just cant afford them.
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post #8 of 9 Old 12-03-2011, 08:17 PM
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Yup, they did a computer reflash. They did mine when the FICM was replaced and now the mileage sucks............
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post #9 of 9 Old 12-03-2011, 08:23 PM Thread Starter
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Any ideas on how to reprogram it to do better?
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