I purchased a d15b 3 stage with double vtec solenoid, i currently have a d15b single stage jdm but my head is damaged.
So...
we transfered the internals of d15b single stage to d15b 3 stage including the single stage vtec solenoid.

Now the problem: vtec solenoid working but no vtec, me and my tuner was confused

Is my oil pump not creating enough pressure? (Engine is now turbo) oil pump still oem from 96 untouched

Or the Oil ports doesnt want the single stage vtec solenoid swap?

Something else? Need some experts help