I've rebuild my engine this past winter and since my vtec never engaged, or maybe I felt it engage a couple times only. Everything check all right, vtec selenoid, vtec pressure switch, oil pressure... I've pull the head off last week cause of a leaking gasket probably because of the o-ring I had on the head (yes I got rid of them, too much assle) and I found out that the ****** ou rebuild my head had shim my race valves springs way too much. It was really hard to turn the cam manually and in fact, my cam and rocker arms are totalled. Everything in the head was ok for engaging the vtec so my question is: If the vtec selenoid engage and pressure swicth send its signal to the ecu and the vtec rocker arm doesn't engage, does the cpu know about it ?

I'm asking this because I had the code 22 when in the vtec range. Since everything was ok, I think the only reason why the vtec didn't engage was that the vtec rocker arm couldn't move with all this load I had on my valves train. What do you think ?

 

I'm not really looking for a real answer, just tell me what you think.

 

If you were throwing code 22, doesn't that mean that VTEC isn't going to engage...? Or do you mean you don't feel VTEC now?

VTEC is supposed to be really smooth. You're not really supposed to feel it unless it's been altered with cams or a different crossover.

 

No the code 22 appear because the vtec didn't engage. The vtec doesn't engage for sure as past 6000rpm, I can definitely feel the torque dropping. Nothing so far seem to point out an electronic failure. So in a more simple way, what I am asking is can the ECU know about a mecanical problem ?

 

the ecu looks for the pressure switch to be opposite of vtec control. For example- vtec onressure switch off, vtec offressure switch on. If you want to see if your vtec is really engaging- disconnect the vtec solenoid and power it up- you should notice a big change in how your engine is running (if it still idles). The only way that I can conceive of the ecu not knowing if vtec really did work (all else working) would be from misfire monitoring (OBD2 only). There are many ways you could monitor vtec but I don't think Honda has put much into their ECUs for that.

 

i had the same code come up in my car about two months ago and my local honda technician told me to try to clean out your pressure switch because they have seen a problem with them being clogged, it worked for me.

 

I've already change the pressure switch to no effect. Anyway, I'm putting everything back together this w-e so I'll clean it to be sure. Thanks.

 

You did check your oil right? You said the pressure was ok but was checking again.....Have you put 12 vols to the solenoid to see if it is clicking....i am sure you have....but who knows....good luck

 

Yes I did. Thanks anyway.