So I bought the truck back in december, and i think a week and a half after i bought it, I got an engine light, and i started noticing my exhaust always smells really rich, like when you first start your car up in the morning, but that smell never goes away, also i'm getting about 15 mpg which running 235's and completely stock is pretty bad from what i've heard. Plus i drive it like an old man. I think i'm going to go ahead and put an o2 sensor in it when i get the funds, but other than that any...
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