2002 F-Body missfire during AutoVe

[GAMEOVER]

Was doing the AutoVE on a 2002 5.7 6 Speed, everything was going perfect and all of a sudden it went Extremely Rich. Pulled over, shut the motor off, did a free-air calibration on wideband(Innovative LM-2) turned the motor back on and motor has a real bad missfire, motor shake's, stumble's between shift's.....Wideband is showing rich AFR(12-13.2)....Before incident AFR was 14.5 in all part throttle areas, under 4000RPM, & Ben's were .99-1.01 .......I'm going to do a compression test today but hopefully it's something minor..... Any ideas on what might have happened?
Stuck open injector?
Bad coil?
Everything was going perfect...

[joecar]

If coil is bad, then unburnt fuel/oxygen would pass thru, wideband would see excess oxygen (lean).

If injector leaks then wideband would show rich like you indicated.

[joecar]

Is it valid to perform free air cal when gases may still be present in exhaust...?

Don't you have to get out residual gases first...?

[GAMEOVER]

I actually unbolted wideband from vehicle and performed free-air cal, (small portable jack...)

[GAMEOVER]

Performed compression test and #1 cylinder showed 1psi, cylinder's 2-8 showed 140psi average....
Removed valve cover & on cylinder #1- Comp Cams roller rockers were just laying on top of head...
Chromoly pushrods were OK, but aluminum Rocker mount was broken at base of rocker. It split like a popsicle stick.....

[joecar]

Ouch, rocker mount just broke...

Insufficient air, injector fires, plug fires resulting in rich combustion...

Pics...?

[joecar]

Ah, I knew you would have performed free air cal in free air...

[GAMEOVER]

I took a pic with cell-phone kinda bad quality...

[5.7ute]

Yikes. Hitting those 8000 rpm cells has a tendency to do that. (joke)
I had an exhaust roller rocker let go on mine as I was on the way to pick my daughter up. I was glad it happened then & not a few hours earlier when it was being pushed to 7000RPM on the dyno. (I wont mention the brand as they went out of their way to rectify the situation)

[joecar]

Why did the rocker mount break...? I have one in my hand here and it does look very light.