Chrysler Repair: 2.5L V6 that wont start., crankshaft rotation, haynes manual

Question
This seems to be a recurring issue in this forum!  I have a 1999 sebring convertible with the 2.5 V6.  It turns over fine, but it won't start.  I searched these forums for troubleshooting tips, bought a Haynes manual, borrowed a scanner and began troubleshooting, but I still haven't pinpointed the problem.  The scan showed no fault codes, so I assume that the camshaft rotation sensor, crankshaft rotation sensor & PCM are good.  When I turn on the ignition, I can hear the fuel pump run for 2 seconds.  I pulled the fuel line off of the rail, and I get a solid stream of fuel when the pump comes on.  I pulled out a spark plug, reconnected it to the plug wire  & held the bottom of it to ground while my wife turned over the engine, and I didn't see a spark, so I'm pretty sure the problem is electrical.  The starter relay and the ASD relay are identical, so I swapped them to test the functionality of the ASD relay.  The engine still turned over, so the relay itself is fine.  I pulled out the distributor & checked the coil resistances, they were within the specs that the manual recommended.  So...now what?  Should I check the pressure that the fuel pump provides?  I'm also wondering if I did an adequate job of testing the spark.

The car was running fine the previous day - no misfires, always started quickly.  The latest issue I had was a dead battery. I replaced that about a week ago, and it ran fine until this issue came up.  I mention that just in case it could have something to do with the current problem.  You've already been a huge help, but any tips you can provide will be much appreciated!

Answer
Hi Brian,
If you had the threaded shell of the plug firmly grounded to a clean spot on the engine head or block then that would be an adequate test for spark, but just in case check it again. In the absence of codes and the verification of the spark coil resistances, about the only other parts of the spark system you would want to check is the rotor and the cap either of which if failed could kill the spark. Check the resistance between the rotor button and its tip, and look for any cracks in the cap.
If you find that you do have spark, then I would suggest that you take a look at the egr valve to make sure it isn't sticking slightly ajar which will lean out the mixture too much to support a catch and idle. If you find it sticking then spray some WD-40 on the stem of the valve where it enters the body of the valve. Finally, keep checking for fault codes which might pop up.
Roland