3rd Gen Engine and Drivetrain -> 2003-2007 5.9 liter Engine and drivetrain discussion only. PLEASE, NO HIGH PERFORMANCE DISCUSSION!

Bad mileage ?

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Old Jul 19, 2005 | 05:11 PM
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666COS's Avatar
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Bad mileage ?

Hello guys im new here

i have a 2004 cummins auto. only 20000 kms on it and it was giving about 17-18MPG consistently and then it went down to 11MPG the dealer changed the computer but they still cant figuire it out. has anyone had this happen before?
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Old Jul 19, 2005 | 06:53 PM
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From: Vegas
Check your fuel delivery. Fuel filter, tank pickup etc.
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