What all wires must be ran to wire in vtec?
Car: 93 Cx
Motor: 98 GSR
ECU: OBD1 P72


So far I have done:

vtec solenoid -- A4
vtec oil pressure sensor -- D6
knock sensor -- D3
secondary intake solenoid (IAB) -- A17
evap purge solenoid -- A20

o2 wiring (I'm using a GSR cat. / plugging one of the o2's):

O2 Sensor Input - WHT to D14 (needs to be a shielded wire)
Heater Control - BLK to A6
Sensor Ground - GRN to D22
Sensor Voltage - BLK to A25 or B1

Is this right for the o2 wiring? I haven't done it yet. What would be the difference in using A25 or B1? Which one am I suppose to use?

BTW >> The civic o2 is also a 4 wire if it means anything:



This is the GSR's o2 (one of them):



Thanks for any help you guys can offer!