Just ground the STI connector, it's a single black 1pin connector. Ground it to the strut tower if you'd like. Then get in the car turn the key on accessory and record the CEL light flashes
White '91 PGL ATX someday i'll convert to MTX, really:)
RActive Heat shielded cone, Pacesetter Header, Random Tech Cat, Dynomax SuperTurbo, Jacobs Ignition, Removed AC System, 17X7 wheels w/ Dayton ZR's...