jrichker, Thanks for the Ford factory wiring diagram manual. I have been looking it over and so far found that there is no difference between a manual and auto EEC harness, nor is there a difference between a manual and auto O2 harness. Lots of great information. I will update on what I find next. I replaced the EGR valve (known to be good) and still got a CM code 33 so I think I have something wrong with the vaccum. Does anyone have a in detail diagram of the vaccum lines for the tab, tad thermactor, egr lines so I can make sure they are correct. Thanks again guys for all the great information and help.