I have had my integra for awhile now and ever since I bought it, vtec has not worked. I have tried switching out the oil pressure switch and the vtec solenoid and I know that my oil is fine.

Last fall I swapped out my vtec solenoid with one of my friends and vtec engaged with my friends solenoid. After I gave this solenoid back to him, i went through 3 different, working solenoids and all 3 of them did not seem to work. I took my friends solenoid back off his car and put it back onto mine (The first solenoid that I tried and it worked) and it did not engage. I know this solenoid works and it has worked on my car before.

With all that being said, I have NO IDEA with what is wrong with my VTEC. I am confused at why my vtec would engage with the solenoid I have on now last fall and now when I put it back on, it wont work.

I was to the point where I didnt even care anymore, but I figure I should get this working. HELP ME

 

you might want to doule check the o-ring under the center cam cap. it could be ripped etc. or even check the ECU (if it has been modded)

 

what ecu are you useing?

 

I have my stock ecu. The thing that throws me off is that when I first swapped my buddies solenoid on it worked, and now I have his same solenoid on and it will not engage.

 

The o ring is the problem then, replace it and that should fix it

 

How much do one of those run?

 

Not sure, never had to replace one but it shouldnt be that much. start another thread and ask lol

 

Ill just make some phone calls. Thanks

 

If the o-ring isnt the problem, could it be soemthing electronic that is bad?

 

Today I just switched out the whole vtec housing along with a different solenoid and it still will not engage. I forgot to mention that my car threw codes p1259 which i know is vtec malfunction. Would that code be associated with the ecu or be thrown because of a loose connection somewhere with wiring?

 

thats what it sounds like to me, did you reset the computer , when you tried out your buddys solenoid? was the check engine on when you tried to make vtec engage?

 

i have not reset the ecu yet, just tried one of my friends ecu's out and my car wouldnt even start. any of the times i swapped solenoids my car was not shooting codes.

 

I am convinced it has something to do with wiring but i dont know where to start

 

i am having the same issues with my car and its pissing the f*ck off

 

What if Vtec is engaging and you just cant tell? ever think of that

 

You can tell if vtec engages. Like I stated ABOVE, I first swapped a solenoid and I could HEAR vtec.

ANyone else have any suggestions of what it could be?!?!

 

And I just found out something about the ecu throwing vtec into a safe mode or something of the sort? Im trying to research it but I cannot find anything useful. Someone help me out thanks

 

is there oil in the motor? have you checked the wiring or ran a wire straight from the vtec solenoid to the ecu? (like you would if your car wasnt wired for vtec)
try a couple different things first then go from there

 

My oil is good. Just changed it today too. I havent tried running a wire from the solenoid to the ecu. How would you go about doing that?

 

Are the 3 vtec wires hardwired directly to the ecu or is this already a vtec chassis?

 

i also switched out my vtec solenoid for a friends and it worked one time wen i took it for a test run and not again after dat,

i have a factory vtec harness, i put direct power to the vtec solenoid and it clicks, i think i will try running the vtec wires

 

any other input?

 

make sure you knock sensor is working and your speed sensor without that you wont get vtec run a staraight power to the soleniod if it clicks its good make sre you have a good ground

 

Second that
Vtec will still work when Knock is not working or plug. It's just that you ecu will go in limp mode.

 

you are correct just found that out a lil while ago i broke my knock sensor