Susan,

You seemed to be convinced that the problem was lack of spark. If that is true, then chasing down the RSR shouldn't be the first order of business. The RSR is what powers the fuel injectors and allows fuel to enter the combustion chamber.

In order to find the solution to your problem in a reasonable amount of time you need to determine once and for all if it is a lack of fuel or a lack of spark that is the issue. I think you said you have the right socket to remove a spark plug, so go ahead and do that immediately after you have cranked the starter a few times. If the tip of the spark plug is damp with fuel then you can probably assume, at least for the moment, that the fuel side of the house is functioning. While the spark plug is out, reconnect it to the lead and lay the threaded park of the plug on a part of the engine that isn't painted or heavily rusty - like a nice clean bolt head or the intake manifold. Then crank the engine over and watch for spark at the spark plug tip.

So do that, then come here with the results.
1.) Was the plug wet with fuel?
2.) Was there spark at the spark plug?