New owner / mpg questions

[JesBdx]

Hey guys, long time listener, first time caller. Just bought a 2013 and love it so far. JLT intake, Corsa exhaust, and cat delete. Everything else seems stock and just completed my first upgrade.

Couple questions for the group:

1. Has anyone installed a leveling kit (strut type)? I have a kit from my 2010 Lariat and might want to install it.

2. My current mpg after having it for two months is 9.5. I use 91 octane and don't really hammer it. Any guesses why it's so bad?

Edit. 3. Also getting no low end response. Is this due to cat delete? What's a fix? I assume previous owner got a tune...no codes thrown from O2s.

 

[CleverGirl_]

Hey guys, long time listener, first time caller. Just bought a 2013 and love it so far. JLT intake, Corsa exhaust, and cat delete. Everything else seems stock and just completed my first upgrade.

Couple questions for the group:

1. Has anyone installed a leveling kit (strut type)? I have a kit from my 2010 Lariat and might want to install it.

2. My current mpg after having it for two months is 9.5. I use 91 octane and don't really hammer it. Any guesses why it's so bad?

Welcome, Do not install the leveling kit. Look up "mid perch mod" and do that. MPG seems low but that's showbiz.

 

[thatJeepguy]

I bet with the cat delete its running too rich. Either that or time for new plugs.

 

[JesBdx]

@CleverGirl_ Thanks! Yeah I've seen a few videos of the mid perch mod. I'll give that go

 

[JesBdx]

@thatJeepguy Is there a certain tune recommended? Is this something I have to do? Or could a shop do this?

 

[downforce137]

its a rowdy V8 truck with 410 gears and 35 inch tires... what kind of mileage were you expecting?

do the math at the pump though, its probably way worse than the screen is leading you to believe...

 

[JesBdx]

@downforce137 Not expecting 9.5 (yeah pretty sure it's closer to 9) when I read I lot on here get 12-13. I've owned 5.4s, 5.0s and 4.6s. Yeah this is a 6.2 but dang

 

[thatJeepguy]

@thatJeepguy Is there a certain tune recommended? Is this something I have to do? Or could a shop do this?

Im not a gen 1 guy but i was getting shyte milage on my commuter and it was the plugs and coil packs going bad . I gained like 2-3 mpg after i swapped them out. Its possible
The o2 sensor is making your truck run rich too.

Disclaimer… I'm not a mechanic just shooting from the hip on this one.

 

[JesBdx]

@thatJeepguy Oh yeah disclaimer noted lol. Never drove anything with cats deleted so just trying to get some opinions from the crowd.

 

[downforce137]

@downforce137 Not expecting 9.5 (yeah pretty sure it's closer to 9) when I read I lot on here get 12-13. I've owned 5.4s, 5.0s and 4.6s. Yeah this is a 6.2 but dang

the cat delete shouldnt really affect anything unless the tune is wayyyy off. the downstream o2 only checks cat efficiency and does not change the tuning rich or lean.

id start with at least spark plugs..

does the exhaust smell real bad?

my perfectly fine running gen1 with 5star 93 performance tune, long tubes, cats and CAI usually got around 11 or 12mpg all around. worse in city and slightly better on the highway.