Gas Mileage Concerns
You all helped me with my ailing 1994 Park Avenue that runs great now thank you! However, every now and again I'm getting the 18X signal failure code; only at start up and if I turn the car off and start it again it isn't current. I wonder if this doesn't contribute to my wierd gas mileage. My Park Ave. with the 3800 series is getting 28-30 highway and 18-20 around town. It seems like a huge difference to me and was wondering if something was causing this? My 1994 9C1 driving the exact same routes gets 19-22 highway and 15-18 around town. Thoughts?