Injector issue??? Poor fuel mileage. - Ford Powerstroke Diesel Forum

 
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post #1 of 8 Old 09-28-2012, 05:05 AM Thread Starter
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Injector issue??? Poor fuel mileage.

Hey guys I'm having a issue with my 08 6.4 with 61k miles on it. Seems to be running fine but getting horrible fuel mileage. I know they aren't expected to get great mileage by any means but I'm lucky to get 340 miles out of a full tank. I'm running spartan 275 which people claim to get around 16-18 mpg with. Could this be injectors failing? I'm not noticing loss of power, smoke, irregular idle, or fuel in the oil. Any help will be greatly appreciated.


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post #2 of 8 Old 09-28-2012, 07:06 AM
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Is there a lot of fuel getting into your oil? It could be a leaky injector or a leaking high pressure fuel line.

08 F350 cc/sb 4X4
h&s minimaxx, 5" flo pro, 4" down pipe, no limit cold air intake, dirty diesel EGR delete with intake elbow, 6.0 exhaust manifolds, custom up pipes, ported intake manifold, Apex 71mm LP turbo, Rudy's cold side pipe, diesel site coolant and transmission filter, diesel site intercooler boots, ccv mod, bilstein shocks, gogo dd solenoid, HID lights, Airdog II 165, PMF traction bars, PMF drag link, moshimoto aluminum radiator
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post #3 of 8 Old 09-28-2012, 07:25 AM Thread Starter
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No none that I have seen. That's what I don't understand. Is there a better way to test it?
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post #4 of 8 Old 09-28-2012, 08:04 AM
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I honestly dont know bud. If the truck is not throwing codes and the fuel is not getting into your oil i am not sure what it could be. What exactly are your mpg's hand calculated?

08 F350 cc/sb 4X4
h&s minimaxx, 5" flo pro, 4" down pipe, no limit cold air intake, dirty diesel EGR delete with intake elbow, 6.0 exhaust manifolds, custom up pipes, ported intake manifold, Apex 71mm LP turbo, Rudy's cold side pipe, diesel site coolant and transmission filter, diesel site intercooler boots, ccv mod, bilstein shocks, gogo dd solenoid, HID lights, Airdog II 165, PMF traction bars, PMF drag link, moshimoto aluminum radiator
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post #5 of 8 Old 09-28-2012, 08:14 AM Thread Starter
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About 11-12mpg on highway!
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post #6 of 8 Old 09-28-2012, 04:00 PM
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How heavy is your foot? Mostly steady speed or lots of varying or low speed?

I'm on H&S Wild Hot Damn and in the city if I drive somewhat hard I'll get 11-12 all the time. If I drive straight highway I can hit 18 pretty easily....may just be the way you drive....as much as I know that is difficult to admit or change....

2010 CCLB Lariat Black w/ Adobe Accent - 2.5 inch lift springs front, 4 inch blocks in back, DPF/Cat deleted with Mini Max, S&B CAI, Kenwood DNX9990HD, RF Punch 10" downfiring in custom center console, RF 300 watt amp, Bakflip F1 bedcover with BakBox, OEM rear camera, Jensen front camera routed through both mirror and H/U with switcher, billet grill,......
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post #7 of 8 Old 09-28-2012, 04:09 PM
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Are you running diff than stock tires?
Are you deleted or just tuned?



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post #8 of 8 Old 09-28-2012, 04:33 PM
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Something sounds f@#$ , what kinda mileage did you get before you noticed this ? Is your air intake cleaned ? etc .. Im usaully 15-16 all day , wot or not with my beast ,

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