I have a 1992 CX Hatch with a 1993 EX d16z6,(only intake, and 2.5" strait exhaust, no cat, 9mm wires) as I hit vtec upto redline the motor pops and doesnt pull as hard as it was. Is my VTEC solenoid bad? I changed the dizzy, the cap, the rotor, the wires, and it still does it.

Thanks