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Discussion Starter · #1 ·
Yeah, after my 4" lift my gas mileage went from the average 13 or so to about 6. WTF happened? i know the lift will cause a little more drag, but it shouldnt be that much, right? my filter is clean and i still am running the stock tires, should i get new spark plugs? my truck has 90k miles on it.
 

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check the cat converter and 02 sensors.
 

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Discussion Starter · #3 ·
what should i look for?
 
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