Update on my "oil in injector housing" question. When ready to install the intake plenum I noticed small amounts of oil coming out of the intake runners when I had the manifold tilted at other then a level attitude. I did not remove the throttle body from the plenum and I had not looked into the plenum yet. I opened the butterflies, used a flashlight and found the source of the oil. It was pooled in the bottom of the plenum and would not run out unless the plenum was tilted off level. The oil must be coming through the pcv system. I have cleaned the plenum and pcv hoses (the valves are new). I am installing a catch can and will post the results when I get it running again. This could be causing failing the N0X standard on my emissions test.