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once again this is from the 92-96 helm's manual (so for a h22a not exactly the h22a4) but you can test the solenoid - by unplugging the connector that goes to it, and with an ohmmeter (if you have one?) you can check the resistance between the pin and ground - you should have 14 - 30 ohms... if you have more or less, your solenoid is pretty much hooped.
if you DO have 14-30 ohms on the vtec solenoid, i'm guessing the filter screen to the vtec solenoid is probably filthy - you're lucky if that is the case - because the filter is a lot cheaper than a new solenoid, and you can prob get away with even just cleaning the filter.
i could see you burning up your solenoid if you have it set that low.. think about it - when set normally your car is only in the vtec range (above 5000 or whateva is normal) for a short time (ie: solenoid opens allows oil pressure to activate vtec), before you change gears and the rpm drops again (solenoid valve closes) operating *normally* the solenoid only has to open for a short period of time. NOW, if you have it set at 2300 or whateva it was set at, everytime you are above that rpm the solenoid is open - and let's face it when you are driving, even without hard acceleration it's easy to be above 2300 rpm wise, so your putting constant use on the solenoid...
this is just the way i see it - so maybe i'm missing something.
report back, also - is your car throwing a code right now? if it's not throwing a code it could be something worse (ie: more mechanical - lobes/hyrdraulic pistons) unfortunatley. - Finally (but perhaps most importantly) you aren't getting any low oil pressure lights or problems are you? perhaps the oil pressure just isn't there to move the hydrualic pistons in the cam lobes.
cheers.
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