Update,
I just compression tested all six cylinders and got readings of 150 (+/- 3) on all six cylinders including #1.
I repeated the test (3) three times with consistent results. All cylinders are at 150.
So to Recap:
1997 Jeep Wrangler TJ, 4.0L 6cyl, 69,000 miles.
- Sat for two years...