Not new to Jeeps, but new to WK's. I just bought the wife a WK to replace her wrecked XJ, it's an 05 5.7 Limited 4x4 QDII with 100k miles on it. I purchased it from a Honda dealer, and I've got no service records on it other than the CarFax. Anyways, I've had a couple of small issues pop up in the week or so that we've owned it. I've done a few searches, but nothing really popped up immediately.
1. The right rear door will not open from the inside. The inside handle isn't broken, and the door will open just fine with the exterior handle. Is there a piece that is known to break and cause this? I didn't see child locks on the doors. I've only had a few minutes in the dark to look at it.
2. It's getting what seems to be terrible MPG. I know it's a Hemi and whatnot, but the first tank got 12.6mpg hand calculated. That was about a 50/50 mix of city and highway. Is there anything that typically fails to cause a MPG loss? I'm sure it needs a tune up, and I have no idea if the plugs/coils have ever been replaced. Other than plugs/wires, what else would cause such a loss?
3. Is there an easy way to make sure the cylinder deactivation system is properly working? The dealer I bought it from changed the oil, and the receipts that I have show 5w20 went into it. I plan to change it soon to put synthetic back in it, but it shouldn't be hindering the MDS system.
Thanks for any help in advance, I'm sure I'm going to get to know this Jeep just as well as the XJ.