I checked my fuel injectors last night and found that when I disconnected
power from the left rear cylinder the idle did not change.  When I
disconnected the injector on all the other cylinders the idle dropped and
the engine almost died.  <<<SNIP>>>.  Does anyone have any ideas?  I would
think that since the cylinder is getting gas and the plug is firing it
should have some effect when I cut power to it.

Sounds like a compression problem. Run a compression check.

G. Matthew Bulley
Principal
Bulley-Hewlett & Associates
Communications for Organizational Development
www.bulley-hewlett.com
(888) 468-4880 toll free