After valve adjustment stall issues.

If it helps any, this is what I do:

Engine warmed up, shut off. Valve cover off, 3/8 + feeler gauges + flathead screwdriver.

Using the screwdriver, I slowly bump the engine over bit by bit (from the starter relay) until I have a piston JUST STARTING it's intake stroke. IE, the intake valve for that cylinder is JUST starting to open. And I mean JUST.

When that happens, I know the mirror piston of that one is on full compression stroke, so then I adjust the mirrored piston.

Sound confusing? Example:

Bump engine until cylinder #2 is JUST starting to open its intake valve. When it's at that point, I stop, and adjust cylinder 5 (the mirror piston to #2).

Then I'll bump it over until I see #3 just start to open the intake valve. Stop. Adjust cylinder #4.

Basically, don't try to watch the cylinder you want to adjust, watch it's mirror. It will be a lot easier to determine TDC compression stroke that way.

As a note: you want your feeler guage to feel resistance between the rocker and the top of the valve. You still want to be able to slide it in/out, but it shouldn't just glide around either. It'ss hard to describe without actually demonstrating it.