Here are my numbers that should be a ballpark for you. My assumption is that as the cam adjuster pad wears down, you get closer to negative numbers. The side that was reading -7 for me was completely gone and the cam chain was riding on metal, the rest of the plastic foot had shattered and was scattered about the cylinder head (I think that's correct terminology). The drivers side is much easier to open up and look at, passenger is a pain and will need to be in service position. Besides having screwed up timing and misfires you've also got those chunks of plastic floating around in your cylinder head, which I swear I could smell, extra burnt plastic smell with the exhaust.

Rough idle and flashing CEL on startup; upon scan the driver engine bank 5, 6, 7, 8 was mis-firing. Upon scanning measuring blocks (70 & 72?), the cam adjuster on driver side was reading -7 (not working), while the other reading 16 (working).