[trularin]

Remove the intake and use a magnetic pickup. If it is stuck, that might be a problem all by itself. If the magnet does not work, get a hydraulic lifter puller ( SnapOn or someone else ). This tool will "slide hammer" the lifter out of the bore.

I can only go by what you post, but I would pull both covers and check all of the valve train.

If each one of the push rods can be verified that they go up, then the only part left is the lifter itself ( prior to the rocker arm ).

Wiping out a lobe seems to be common lately.

From what you say, the lifter bore or the lifter appears to be the problem.

Please keep us posted.

Hope this helps.