Noob, vtec, what else is there?

Hey, I wanna test my vtec before i get my p28. What is the ground, power, etc. There's 2 prongs in the green clip and 1 in he black. I would think black is ground but I don't know. If someone knows, help this noob out please.

Still looking for an answer. I know now that black is power, but what are the other two. I can find where they go to the ECU, but not their values. I know you guys will probably tell me to wait a week for the ECU, but I wanna make sure the solenoid works. Is there another way to test it?

[makku]

the 2-pin plug is an oil pressure sensor. not necessary to test it.

[mark7901]

Do you just want to test to see if its working?

Yeah, I hear the solenoid click, but the engine doesn't bog or anything.

[mark7901]

Your engine is not supposed to bog @ vtec, it is supposed to get louder (faster). You could use some sort of test light, but really all that that will be doing is checking to see if the soliniod is being activated. I really dont notice THAT much of a diff. when I hit vtec. I do notice the car gets louder. But since its stock, I dont think I would "feel" that much more. Highway on-ramps is usually the best place to test. Make sure you have adaqute oil, and take it for a spin. If you hear a enigne noise level change @ around 5,500 then it should be working. Besides that, Im at a loss.What engine do you have?


Here are some ECU specs, this may help you.
http://www.turbod16.com/viewtopic.php?t=3572

No, I tried at idle. I heard it will bog when engaged during idle. Also I have NO ECU to trigger a light. I'm trying to be the trigger. If all I need in theory to do is supply a 12v signal then someone let me know. Maybe I'm wrong that I'll hear a difference at idle. I'm running rich so I'm not worried about goining lean by triggering it without vtec fuel maps.

[mark7901]

Originally Posted by decev

No, I tried at idle. I heard it will bog when engaged during idle. Also I have NO ECU to trigger a light. I'm trying to be the trigger. If all I need in theory to do is supply a 12v signal then someone let me know. Maybe I'm wrong that I'll hear a difference at idle. I'm running rich so I'm not worried about goining lean by triggering it without vtec fuel maps.

Oh, I got ya. I never heard of doing it that way. Learn something new every day!

[makku]

it's possible your oil pressure isn't high enough when you are at idle. The solenoid is opening the oil passage to engage vtec, but maybe the oil pressure is too low to do it...

just a guess.

So can I hop on the freeway and supply 12v? would this be enough to actuate it if in fact it's working?

Originally Posted by makku

it's possible your oil pressure isn't high enough when you are at idle.

I was thinking this too, forgot to mention thanks Makku.

[mark7901]

I guess. Basically its a combo of a few things that activate vtec. The source current (which you understand) plus a certian amount of oil pressure, and the actual mechanical side of it (pins locking the arms into place). When you hit 5,500 rpms are you not noticing a change? Also what engine do you have?

B7/Z6 mini-me w/ p06. I recieve my ecu on Monday I think, but I wanna mess around. I just want to trigger it.

[makku]

oh.... did you remove the little oil control jet thingy in the block? that will prevent vtec from engaging...

Yeah I removed the oil plug. I triple checked everything in my mini-me. Should a 12v signal trigger it if everything is working properly? The oil pressure switch only tells the ECU there's enough pressure for vtec to engage right?

[makku]

yep, it should work the way you have it setup. and yes, the sensor just doesn't let the ecu trigger vtec unless your pressure is high enough.

Thanks, hope there's no CHP on 99 right now.

[mark7901]

You can hit 6,000 rpms in 2nd gear. You dont need to be speeding, lol. Good luck!

So instead of tryin' to hold onto 2 wires and drive, I went to my shop. Did I say it's my mom's house, well the shop. Found an old horn for my bug I used to get a ticket signed off. Wham, clash, bing, bong, a couple more bongs, and wha la. There was a difference in tach and speedo, although it made no real noticable noise. I can't wait for real P28 V-Tec. I actual think that anyone who's gonna use an RPM switch should just get a button. It don't kick in cruisin' on the freeway. Well here's a pic.