New CAI bad mileage
Hi, recently installed cool air intake dual on my 2006 Cherokee 5.7L. I got up to 15 mpg the first day. The next day it dropped to about 10mpg and sometimes goes down to about 9mpg. When disconnect the battery and run it again the mpg can go back as high as 14 to 15mpg. After I turn it off and use the vehicle again it starts to go back down to about 10mpg.