Dreaded Tensioner...
 

Hello,

Excuse me if this issue has been addressed, but I just could not find it in the S70 threads.

1998 S70 T5.
Manual Timing Tensioner exploded somewhere en-route my 40 mile freeway commute (only noticed the flapping/banging when at the offramp).
Replaced tensioner.
Struggled with it, but believe I have aligned the crank & cam markings and adjusted everything correctly.

Now, I am getting a P0300 (multiple cylinder misfire), P0301 (cylinder 1 mis) & P0302 (cylinder 2 mis).
Obviously rough idle.

My fear is an internal issue (rod, etc.) - but curious that only two cylinders are missing after multiple clears/restarts.

Any guidance for a poor woodworker out of his element?

I would do a compression test. That will tell you if you have any bent valves.

only read ~120 on cyl #1 & 110 on cyl #2 - but it was pretty cold, as I was afraid to run it to op temp.

You don't have to test at warm temps. You're looking for even pressures across the board with no more than 10% variance. Give each cylinder a slow 5 count when cranking with throttle wide open. You don't want to run it when testing.
Ed