check oil level,vtec screen to see if its clogged if not than remember the car must have its temp sensor functioning at operating temps for oem ecu's,throttle pos sensor, speed sensor, good oil pressure to the vtec pressure switch ect.. for vtec to engage. also you can use a jumper wire from battery to vtec solenoid to her it click off and on. around 5000+ rpm is when vtec should start to take over or it will fall on its face so to speak.
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