VTEC not working

[ghettochildpr]

Well i got a 89 crx with a sohc vtec in it, got a b16 PR3 ECU, but the vtec doesnt work, i checked if the ECU was sendin the signal, and yeah it is, checked it out with a led bulb and it activates at 4,500rpm , also checked the selenoid directly to the battery, and it also worked, my vtec is supposed to sound very loud since my cylinderhead has some work on it, n my friend got a 94 civic ex n has da same work on da cylinderhead n it sounds very loud when da vtec activates, but anyways, just hoping someone can help me out here since the ECU is sending da signal n da selenoid is working, any help ill appreciate. Thanks in advanced!!

[Greenblurr93]

how is your oil pressure?

[ghettochildpr]

cant tell u exactly the pressure bout it, but the motor was rebuilt a couple of months ago, has no leaks, i think the oil pressure is fine, since it goes all da way to 8,000rpm n doesnt complain, know what i mean, but if dats important to tell if dats da problem well ill check it out when i get da chance n ill tell ya, thanks!

[Greenblurr93]

yesoil pressure is important because if the Wyech oil pressure swithc doesnt sence enough pressure, it wont allow vtec to engage.