need some help on codes

[project 87 5.0]

its a 87 gt. first it runs rich, then sometimes when driving it pops in the intake untill you get to about3/4 throttle then its great. not sure how to pull codes.

 

[liljoe07]

This link will show you how to pull codes.
http://www.stangnet.com/mustang-forums/698148-help-me-create-surging-idle-checklist.html

You may also want to test the TPS voltage sweep from closed throttle to Wide open Throttle. Engine Off of course. Shoule be nice and smooth with no drops or rises in the readings. Codes first though.