Ok, I am sure this has been asked a hundred times, but I cant seem to find any info on it....lately, I have noticed that the front of my mark sits up way too high...almost like the bags are fully extended. what could cause this? its also in the last week make the ride alot more firm... not sure if this is connected or not, but up until about a week ago, it also would drop about 2 inches when I cranked the car.. this has since stopped and it just sits high. It wasnt a slow drop, but a sudden "pop" and it would be down. could this be ride leveling sensors bad, or a valve somewhere thats not venting the air? thanks for any help