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why only 11mpg in 4.7?

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  #31  
Old 04-03-2008, 03:55 PM
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Default RE: why only 11mpg in 4.7?

ORIGINAL: shrpshtr325

its the one pre cat that is bad if your getting bad mileage tho, engine side of the cat, just to clarify, controls the a/f ratio and how much gas you are burning
Just lookingto clarify. There are 2 different answers. Is it the pre or post cat you would want to change?
 
  #32  
Old 04-03-2008, 05:39 PM
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Default RE: why only 11mpg in 4.7?

well the parts guy at napa auto told me there are 2 sensors to replace and im not sure if he meant one post and one pre or 2 pre cat so im going to wait and see if the new plugs and throttle body cleaning make any difference first. i know i have been running on a spare on the front left of the truck but i have a new tire i am putting on in the next couple of days
 
  #33  
Old 04-04-2008, 11:07 AM
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Default RE: why only 11mpg in 4.7?

I had the same setup as you and got low 18's on the hiway... city well I never measured city mileage as it'll never be the same twice.
 



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