I was doing some PM's on the WJ a couple of weeks ago and decided to put some fuel injectors in. It ran great for a while (18.9mpg), but a couple of days ago I noticed my mileage is sitting at 15.2mpg. I know the display isn't as accurate as it should be, but what could be causing the drop in mileage? I have 175,000 on my 4.0 and have had the plugs changed about 25,000 ago. As far as I know the 02 sensors have never been changed. Where should I start looking? It idles great and the only code I have is my large evap leak that I can't get rid of.
Gas milage woes
