have an 06 lbz. it started getting shitty fuel mileage about 3-4 weeks ago. changed the fuel filter and cleaned the air filter. mileage didnt change. truck used to get anywhere from 19-23mpg depending on what i was doing. would get around 15mpg pulling a 9k lb trailer. now the truck wont get over 16mpg running empty.
I have efi live. i have never data logged with it before. i am pretty sure i know how. just dont know what PIDS i need to choose to check. im thinking maybe its a bad injector or cp3 or somthin? any help would be appreciated.
I have efi live. i have never data logged with it before. i am pretty sure i know how. just dont know what PIDS i need to choose to check. im thinking maybe its a bad injector or cp3 or somthin? any help would be appreciated.