Thread: Wiring in the solenoid wires into a stock SR20VE ECU.

ok guys so i just wired in each of the power wire from the solenoids into my wire harness to my stock sr20VE ecu.
SR20ve Pin out states that,
pin #102=intake cam
pin#106=exhaust cam

Do I just ground the other two wires from the solenoids to the chassis or is there a specific place for them? Thanks

You need to supply them with 12v first. Whether that's from the ecu or any supply. The pins you are talking about are the grounds.

oh damn grounds uh?...thanks man...
so what triggers them? from my understanding the intake activates first then the exhaust to keep a good power band...
some images I went off of..

You need 12v from any constant supply and the ECU will ground them up when the RPMs reach the switch point.

This is exactly what I have in my engine,



Thanks to JK Tuning for the image

In your case red and blue would be pin #102=intake cam, pin#106=exhaust cam

And it's always good to have an activation light in between the circuit on each cam for troubleshooting purposes.

You can bypass the relay in this example and run it straight from the ECU to the VVL solenoid.

Got it!
thanks guys for the help greatly appreciated..
I think this would be a good sticky in the VVL how to section for others trying to do this..

used to have this until i replaced it to a NEMU...

im not sure why the VVL switch to 6200rpm when youre not using some external triggers..very late

that is very late with a 7200rpm rev limit. I thought they kicked in sooner.

Yes I found this out yesterday after wiring it up with some LED indicator lights..Seems like they activate pretty close to each other 6200in/6300ex..
I'm going to hook the switch window back up.
Having them activate together at 5100rpm feels so much better..
for those wanting to do this on a B13 harness pin#106(exh cam) is empty so you would have make pin wire for it..I got mine off an old harness I had laying around..Peace

I think this may be related to the fact that the switch is based on speed and not rpm signal, if you rev it standing still it won't activate.

I know because I just did a swap and used the VE ECU.

Now I'm trying to use my current wiring with an ebay vtec controller and it won't work. I was told vtec activates with 12v as opposed to Neo VVL that does it with ground so I may need to modify my current wiring :/