New owner / mpg questions

[JesBdx]

Yeah exhaust smells real bad. Running rich I assume as thatjeepguy mentioned. I'd be happy with an 11-12 average

 

[downforce137]

does it have the spacers in the downstream o2?

im not really sure how you figure out what tune is or isnt in there without the original handheld tuner.. maybe contact previous owner, but if that is not an option it might need to go to the dealer for a reflash back to stock and then you can retune it with whatever you like...

 

[thatJeepguy]

Yeah exhaust smells real bad. Running rich I assume as thatjeepguy mentioned. I'd be happy with an 11-12 average

Its either shes ******’ fuel , or its not being ignited properly.

 

[mprice1234]

My completely stock 6.2 2010 gets 11 in town not hitting the pedal hard and 15+ on the highway doing 75. I've gotten over 16 at times on the highway and low 10's driving it a little harder in town. Just thought I'd throw these numbers for a reference for you.

 

[JesBdx]

@downforce137 No downstream sensors, just upstream

 

[dj30417]

A long term picture for your mpg.

 

[thatJeepguy]

@downforce137 No downstream sensors, just upstream

How dos the truck know how to trim fuel with nothing downstream? Hook up a scanner and look at your Afr % and report back.

 

[MurderedOutSVT]

Welcome to FRF!

Don't feel too bad, 7.7 mpg all day long

 

[cptnslo]

I’m surprised you aren’t throwing a code already with a cat delete from the downstream sensor but I don’t know the location of the factory cats. Is there a chance it’s already tuned.

 

[Meat2022]

I'm running 5 star with 93 performance tune, 33lbs of air ,true dual exhaust, s&b intake , I average 12.9 mpg I never run less than 93 octane, I get up to 15.9 if I baby it. Worst I've ever gotten average was 11.5 ish.