My 07 Ultra classic started running on one cylinder and not very well on 1 cylinder on the way home from work. I pulled the plugs and got 180 psi on the front and 175 psi on the back compression test, i figured that was good. While I had the plugs out I grounded them against the head bolts. The front one sparked every now and then usualy when I released the start button, weird, never did see the rear plug spark. I pulled the trouble codes and got a Low front o2, a low rear o2, a high rear 02 and a front cylinder no combustion. I cleared the codes and started the bike. It would run a little and then die, did this 3 or 4 times and checked the codes, no codes. Any ideas where to go from here? I read on this forum that if the crank or cam position sensor was bad the trouble codes would pick it up? If so I'm thinkin coil, so how do you check and remove the coil? Any other ideas?