Car will not restart when warm. Cranks but no spark until cools down 1Hr.

1994 Cadillac Concour N* 4.6L. Runs strong and smooth after starting.

read Larry Carrley post on his daughter Saturn. Identical except I replaced CPS and still have no Start when warm.

I have thrown the following parts at problem, Elec Fuel Pump, Fuel Pressure Regulator and CPS.

I have not replaced the Ign Module w is a $600.00 part across the Cad Dlr parts counter.

What do you think?

Optional Information:
1994 Cadillac Concour 4.6L N*

Already Tried:
test fuel pressure it OK replaced Elec Fuel Pump repl FPR repl CPS