[:@]my 97 626 lx 4cl. auto.has a check engine light on indicating that its running rich and having to correct it turns off every now and then but when its on i only get about 17-19mpg i should be getting around 23 thats what i get when its off whats wrong? also the auto-window fuse blew and we fixed it and now the turn signals dont work any ideas why and how to fix it?