I'm trying to think of reasons why the Mystique has been getting VERY bad gas milage lately. It hasn't been making the "moosing" sound though. I just changed the plugs and cleaned out the UIM/LIM. Any ideas?

I'm sure the winter gas mix and cold weather hasn't helped but it seems worse than it should be. We had just shy of 200 miles and a little under 1/4 tank of gas left (yes it was filled up completely).


Could the IAC be partially stuck? It isn't moosing....


Aside from the bad gas milage it runs fine. No problems whatsoever, aside from the gas milage.


1999 Mystique LS V6 Alpine CDA-9807, Rear deck sub, Opt. TB, K&N RU-3530/MAF adaptor, custom heatshield, FSVT 17's, SCT 4-program chip, Eibach's/ST200's, Hella Fogs...