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Gas mileage

   
  #1  
Old 04-11-2016, 02:25 PM
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My 2nd gen 4.3 is getting 10mpg with 31 in tires. This doesn't make sense to me it should be getting much better. Anyone have any idea why this would happen. Any input would be greatly appreciated.
 
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Old 04-11-2016, 02:28 PM
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Could be a lot of things. Full tune up, including o2 sensors maf cleaning, egr cleaning. etc
 
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Old 04-11-2016, 02:47 PM
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Thanks for the input Newguy. I will check all those things.
 
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Old 04-11-2016, 03:08 PM
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Possible fuel leak inside the plenum could also be a factor.
 
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Old 04-11-2016, 03:12 PM
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Would there be an oder of gas? Iwill look into. Thanks Thogert
 
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Old 04-11-2016, 03:13 PM
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I'd say do the tune up, then if it doesn't help, do the fuel leak down test that's floating around here on the forum.
 
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Old 04-11-2016, 03:31 PM
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Will do.
 
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