My SPFI wagon has had a issue for a month now

 

Symptons:

• running like crap
• down on power
• wont idle without some throttle
• super rich, can smell unburnt fuel

 

Things done

• checked tps ohm and idle switch
• checked CTS ohm
• replaced cap, rotor and plugs
• air/fuel filters good
• fuel pressure good
• IAC works correctly when tested.

MAF clean ? No air leaks in any ductwork ? 
 

Injector ? 

wasn't it this era that relied quite heavy on the input of the oxygen sensor? What does the injector spray look like ? Can you see it looking into the throttle body ?

I might be in Australia, but I have had one of the spfi manifolds, and have feint memory of it.