In working on a 2005 Dodge Charger with the 2.7L with 105,000 miles on the clock. Car came in with a check engine light for misfire on cyl #1. Found cyl 1 spark plug and coil had oil contamination. Started repairs by replacing all 6 plugs per maintenance schedule, cyl 1 ignition coil, and valve cover gasket w/spark plug tube seals. Noticed timing chain tensioner was almost all the way out while I had the valve cover off. Also noticed a strong vacuum leak at the front of the intake manifold. Plenum was warped enough to leak around cyl 1. Replaced intake plenum seals and applied rtv to save from having to replace. After starting the vehicle again, same result with engine running great until it got up to operating temp. Misfire returned on cyl #1. Swapped fuel injector to cyl #2 and again, cyl 1 misfire came back at operating temp. Observed pulse width and noticed all values were about the same until operating temp then cyl 1,3,5 stayed around 2400 and cyl 2,4,6 dropped down to around 1800. Checked compression with engine cold and found all cyls at 175-190 with cyl 1 at 185. Any guidance for what I should check next would be great!