I swapped a b16 into an 89 DX hatch, wired MPFI, plus everything for vtec. Tested wiring at plugs and at ECU with a multimeter, everything is wired up right. The car doesn't throw any CEL's, but vtec won't kick in and the motor won't rev over about 6800rpm. About a week ago, I disconnected the vtec wire at the ECU, ran 12v from the fuse block to a switch, then from the switch to the vtec wire. Vtec worked fine, and I ran a 15.30 with a CEL for the vtec solenoid (with the car still not revving over 6800). The ECU is a PR3-003

Any ideas?