i just did a swap in a 92 integra ls with a b16a using a 95 gsr ecu everything works well vtec kicks in perfect untill maybe ten minutes later i get a check engine light and i think its code 2 and code 21 so what sould i do can somebody please help me out please.
No such thing as a code 2.
Code 21 is your VTEC Solenoid.
Check your wiring and get rid of that P72. They run B16’s like ****.