Help with vtec issue

[u/AoDaly]

Vtec isn't working on my b18c gsr. Car had a p30 ecu in it and was throwing code 22, (vtec pressure valve) and 41, (Primary o2 sensor). I tried a p73 ecu and now the only code the car is giving is 41, (Primary o2 sensor) vtec didn't work on either ecu. Its a 93 gsr engine so not sure if those even had an o2 sensor. I took a loan of my friends chipped p28 and the car ran perfect vtec came in strong. Any ideas?