time for a fuel system. stock fuel systems only last for 100000-125000 miles.
the oil on the injector dont worry about. it isnt from coming up around the injector. the threads on the injectors dont seal very well, so anything can run down from the top side. as long as the copper washers are good nothing can leak into or out of the cyl.
you replaced the cdr valve, where did u get it from?
just quick test the valve. take it off, see if you can blow threw it both ways. if you can both ways, it is bad.