car is running rich! help me make a check-list

[kenversusryu]

I seriously screwed myself over with my ram air. I'm running crazzzzzy rich with an average of 18.5 mpg (26 mpg before). After removing the ram-air, i'm still getting the same mileage.. so now i'm gonna check everything tomorrow. I want to make a list of everything that can affect an engine running RICH (NOT MAINTENANCE ISSUES because i did most of it) so please add anything to this list. the rich list check-

-timing
-o2 sensor
-knock sensor

these i'm not 100 percent sure
-cap rotor?(i don't know if a bad set can make you run rich but i know you can get bad gas mileage)
-spark plugs?(same thing with cap/rotor)

everything seems to run fine.. except i'm eating up gas.

anything else to add to the list?

btw i did a search and i got 12 pages. HELP A NOOB OUT!

95 s14 ka