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6.0L Power Stroke Diesel 2003 - 2007 F250, F350 pickup and F350+ Cab Chassis, 2003 - 2005 Excursion and 2003 - 2009 van

Only getting 6mpg

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Old Nov 25, 2016 | 12:19 PM
  #1  
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Only getting 6mpg

Hi everyone,
looking to get some input...Can anyone tell me why my fuel mileage is down into the 6mpg? Thats what its saying on my dash, although im sure its fairly accurate because Im not getting anywhere near as far as before on a tank of fuel. Truck is serviced regularly. Thank you
 
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Old Nov 25, 2016 | 12:35 PM
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What the coolant temp getting too?
 
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Old Nov 25, 2016 | 12:39 PM
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Not sure the exact temperature, but its going up on the gauge like it normally does. I installed a coolant filter kit a couple months back. The low mpg was happening before I installed it.
 
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Old Nov 25, 2016 | 01:30 PM
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How does it idle on a cold start? Any smoke out the tailpipe anytime?
 
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Old Nov 25, 2016 | 01:31 PM
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When its cold out, its been blowing white smoke until it warms up.
 
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Old Nov 25, 2016 | 01:42 PM
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I shoulda asked if you have any electronic diagnostic tools to work with. we need to see some numbers. There are a lot of possibilities but I suspect injector issues. FICM (Fuel Injection Control Module) voltages is where I'd start.
 
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Old Nov 25, 2016 | 02:01 PM
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I tested the ficm with just the key on, it read 48 volts.
 
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Old Nov 25, 2016 | 02:52 PM
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Live data is what is needed.
One quick way to get that is this tool

https://www.scangauge.com/products/scangauge-ii/

Then program in the Xguages for the Ford 6.0L PSD
https://www.scangauge.com/x-gauge-co...ncoln-mercury/


Here is a how to program Youtube.



Sean


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Old Nov 25, 2016 | 05:07 PM
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Is the oil level going up? Or coolant level?
 
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Old Nov 25, 2016 | 09:43 PM
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how long do you idle?
 
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Old Nov 25, 2016 | 10:09 PM
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Ouch..........the Cat powered semi I drive at part time gig does that good
 
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Old Nov 26, 2016 | 12:53 PM
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Originally Posted by Knucks
Hi everyone,
looking to get some input...Can anyone tell me why my fuel mileage is down into the 6mpg? Thats what its saying on my dash, although im sure its fairly accurate because Im not getting anywhere near as far as before on a tank of fuel. Truck is serviced regularly. Thank you
First I'd manually check your mileage to be sure the gauge is correct.
Next, you really need some engine data as suggested.
Is your turbo spooling up? Any loss of power? Rough at startup? Last time you changed your fuel filters?
We need to see info with koeo and engine running? What's your Baro, ebp psi, MAP, etc. EGR?
Lots to evaluate on these engines.
Obviously speed and towing have some affect but 6 mpg is ridiculous.
 
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Old Nov 26, 2016 | 03:42 PM
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Verify that the parking brake is off.
Could have a bad bulb.



Sean


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Old Nov 26, 2016 | 07:30 PM
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Possible dragging brakes.
 
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