"té_qui" wrote:
>
> Need people's expertise here. I have a 92 VX with the VTEC-E. I'm having
> problems with something I have yet to discover. My question is ... In my
> quest for the search of my problem, is there a way to manually activate the
> VTEC to always be on. Right now, The VTEC-E is set to activate at about
> 2500-3000RPM. My problem is that below these RPM, I get very low performance
> but as soon as I hit 3000RPM, the VTEC or whatever kicks in very hard to
> scream down the road. So I'm basically tring to see if it's the VTEC not
> properly engaging itself or if it is something else. If I unplug the VTEC
> spool valve or the pressure swith, don't remember which, I pretty much solve
> my problem but have no VTEC above 3000RPM.
> Any Ideas on how to activate VTEC? Do I need to ground the Spool valve or
> the pressure switch?
> Thanks
> Frank

Some service manuals call it a spool valve, other a solenoid valve, I
guess spool valve is a poor translation from Japanese, a solenoid is, in
effect, a spool of wire. I'll refer to at is the VTEC Solenoid Valve

The VTEC Solenoid Valve is always grounded, it is turned on by applying
voltage to the single pin connector. The service manual is somewhat
confused on the issue, in the wiring diagram it shows the wire from the
ECU to the VTEC Solenoid valve being ORN/WHT. It then connects to the
engine wire harness where it changes color to GRN/YEL. Now, in the
troubleshooting section it say to apply battery voltage to the GRN/WHT
terminal to open up the VTEC Solenoid valve. My interpretation is that
you should remove the 1-pin connector from the VTEC Solenoid Valve and
apply battery voltage directly to the pin on valve.

I would be cautious about this. Under normal operation, VTEC will not
engage unless the engine is warm and the oil pressure is sufficient. I
would pull a wire from the VTEC Solenoid valve into the cabin and either
have lighter plug type connector on it or some sort of switch to +12V.
That way you can engage it while driving and make sure the engine is
warmed up before doing so.

Sounds to me like VTEC is slow to disengage in your engine. I don't know
if there is a port to release oil pressure when VTEC is disengaging, or
if it is just expected to leak down. In either case, If you are close to
doing an oil change, you could try using the thinnest oil recommended
for your engine (or even spring for a full synthetic) and see if it
helps.


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