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Old 04-13-2014, 11:31 AM
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Please help... timing gas milage problem...

Hi guys, I need your help...
I put on a Airaid CAI last November on my 2012 JKU (3.6l automatic).

From there my milage per gallon went up a bit, maybe due to winter gas or colder outside temp. Yesterday, the outsite temp was around 15c and I went for an highway ride... about 250 miles. I usually do 10l/100km but yesterday I did 12l/100km, shift points seemed to be all over too. So, do I need to tuned the motor (Dealer says Pentastar does not need it...) Do I need a procal module and reset everything, gear ration, tire sizes ?

Why I get worst gas milage at 15c outside when in January at minus 10c I got better ?

Please give me some advises

JF Cossette

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Old 04-13-2014, 12:13 PM   #2
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Your profile doesn't specify, but did you change your wheels or gears? Looks stock in the profile pic. Those would be reasons to use a Procal. If you're completely stock, no need for a programmer.

I'm not familiar with the CAI's, so not sure about your gas mileage though.

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Old 04-13-2014, 12:22 PM
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Hi, thanks for the reply, yes I'm stock, 3.73 ratio, 32 inches tires
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Old 04-13-2014, 12:33 PM   #4
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Quote:
Originally Posted by JF Cossette View Post
Hi, thanks for the reply, yes I'm stock, 3.73 ratio, 32 inches tires
Yup, no need for a programmer then.
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