Alright, so, Vtec hasn't been running, did some research, code 1259 popped up saying it was either vtec oil pressure switch or vtec solenoid valve, so dled the helms manual and have done all the diagnostics test in order, all have passed, the solenoid valve and switch both passed multimeter readings along with their connectors, took solenoid off and replaced both gaskets and checked plunger for no binding and smooth pumping. Next step in the process was to hook up a oil pressure gauge, not the actual sensor sending under under the car by the oil filter, but right under the distributor to the right underneath the valve cover, when I hook the oil gauge there, there is absolutely no oil pressure, can start engine and rev to 5000 not a drop comes out, stuck a magnet into the hole and its perfectly clear but no oil pressure what so ever, T didn't attach gauge to bottom switch because the car runs fine and makes no clicking sounds so im assuming its running with normal pressure, it's just not sending enough pressure to the vtec solenoid which is causing it not to engage.



So if anyone has any experience or know how on this matter, it would greatly be appreciated.

Car is 1997 base lude, M/T, No mods, oil level is about 1 quart low atm, 100k miles, no other cels, runs fine, just irritates me vtec isn't running, and ya rev limiter kicks in around 6.5k

 

If your oil pressure tester doesn't have a really really long hose on the end, then go to autozone and get an oil pressure gauge kit, it'll cost you like $20.00 for a cheap analog unit. There's two holes actually, the second one is in the same location, but in the rear of the head and you'll need an allen wrench or allen socket to take it out. I would use the rear hole for the test since it'll be easier that way.

Remove the allen plug from the rear of the head, install your 1/8" NPT oil pressure gauge fitting and tube. Run the tube through your firewall and into your glovebox temporarily, then leave your oil pressure gauge in there.

Have a friend hop in the passenger seat and hold the oil pressure gauge as you hop in the driver's seat. Put the car in first gear and take off. Around the time VTEC is supposed to kick in, the oil pressure gauge should go from zero to about 25+psi. . If the gauge doesn't move, then you have a problem. If the gauge moves, you need to look elsewhere for the problem.

The test will NOT work in neutral. It will only work in gear, under load, and the speedometer MUST be functional.