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110k miles, brake booster failed/broke the diagram. Replaced cylinder as well. Around that time noticed I started plowing through gas. Cleaned k&n and recharged. Changed plugs, carbon build up on plugs and exhaust. Boost is slow/sluggish. Added some chevron techron. MPG is still crap... used to live at around 17-18 around town. I'm driving between 6 to 7k ft above sea level. - Ideas or toughts?...
 

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I thought this was going to be about hookers. I'm calling clickbait!
 

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Something get unplugged when you were replacing the brake booster? The carbon build-up suggests overfueling, which would make your fuel economy go to crap and will ultimately cook your cats.
 

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Something get unplugged when you were replacing the brake booster? The carbon build-up suggests overfueling, which would make your fuel economy go to crap and will ultimately cook your cats.
The build up was noticed while replacing the booster. I checked the O2 sensors and found build up... which started the whole mess
 

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110k miles, brake booster failed/broke the diagram. Replaced cylinder as well. Around that time noticed I started plowing through gas. Cleaned k&n and recharged. Changed plugs, carbon build up on plugs and exhaust. Boost is slow/sluggish. Added some chevron techron. MPG is still crap... used to live at around 17-18 around town. I'm driving between 6 to 7k ft above sea level. - Ideas or toughts?...
I had a similar issue with my 2011 that is about to hit 150k. Mpg dropped from 18 to 15. Changed plugs and coils but had no improvement. I then cleaned the mass air flow sensors and MAP sensor. The MAP was so bad I just replaced it. Now I'm back between 18 and 19 mpg.
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