EWillden

I was wondering if any of you know how to ground out the VTC's i need to find out the problem because it is getting annoying to listen too. If you have instructions please let me know.

cneary812

I think there is a post in the faq section but it is really easy to do. just cut open the boot to one of the VTC selanoids and tap into the yellow and black wire and ground it to the engine. Takes 3 minutes.

EWillden

Okay i will lok in the faq section. Thanks for your help.

«§»Craig B«§»

iTrader: (5)

www.4dsc.com/technical/vtc

or my site
www.prism.gatech.edu/~gte671n/mymax.html in the how-to section

cneary812

your in the faq section

EWillden

Hey thanks Craig for all of that info. I will get on it asap. And by the way cneary, this is the forum section. Not faq section. the faq section is labeld by maxfaqs. thanks again for your help.

cneary812

I meant at the top of the 3rd gen faq under important. Right on the first page.

jowing

I grounded the VTC today, quite easy to do, but is it safe? I don't hear any clacking noise anymore seems like there is no different in power. Has anyone have problems leaving it grounded?

EWillden

As far as i have been told. It doesn't hurt anything. The only thing the VTC's are there for are emission control. But it doesn't affect emissions very much at all. So it's ok to do it.

todamax

iTrader: (6)

My 92' SE came out of storage long enough to pass Illinois emissions last weekend. With teh VTC's grounded, it still made the "Fast Pass".

«§»Craig B«§»

iTrader: (5)

actually VTCs change the timing and are not really an emissions thing

some have proven a power loss with them grounded, but many others have said they couldn't tell a difference. I think it may have to do with the condition of the VTCs to whether or not they help/hurt performance

I've had mine grounded for about 2 years or so and no problems from it

cneary812

The only thing that I noticed when I grounded mine was that my idol went nuts but my gas mileage got better and performance was about the same. When I removed the ground (have quick disconnect now) it now perrs smooth most of the time, but gas mileage went to the pits again.

Nmax92

when I grounded my VTC's all the connections were fine, but.....when I started the car, the car would not turn over at all, not even a peep from it. Can anyone tell me what **** happened. I'm not a serious electrician, but I made sure the connections were clean.
Please help

todamax

iTrader: (6)

There should only be 1 wire tap, and 1 ground...

Nmax92

I am using one wire tap, I tried it on both VTC (one at a time of course), but the same thing happens to either one

cneary812

did you hook it to the yellow and black wire?

Turbo91max

well i feel like a real idiot and i know you will all laugh at me but what does VTC stand for ? i understand what it does and everything but what does it stand for...?? thanks ...





take it easy on me ... just a simple question....

cneary812

V=Variable
T=Timing
C=Control

sgoyal

iTrader: (1)

Guys, a quick question. I grounded my VTCs this past weekend on my 92 SE. Got rid of the horrible noise and the gas guage seems its moving slower. There is a little problem with the idle however:

When coming to a stop, as soon as I press the clutch in, idle dips to around 400 and then quickly recovers to 700-800. It happens every single time, I stop at a light. Anyone had the same thing happen to them?

This isn't a big problem, I can easily live with it, but just curious. I haven't changed my timing at all yet, might try bumping it up this weekend.

Thanks for all the great info.

SG

snowman2155

I recently grounded my vtc's, but it doesn't seem to be doing anything. Any suggestions would be appreciated. Thanks

jakew8

Tip: make sure you brush the area of that fuel rail crossover where you're grounding your wire with a metal brush. If there is gunk under the screw, you may not be getting a good connection. Make sure it's shiny and clean before you screw on your ring connector.

Now, here's a question for you all: I recently grounded my VTC's and it worked flawlessly. Idle isn't too crazy, and no noise. When I first did it though, it seemed like the car had "lost a step." Just a little sluggish off the line. Now (five days or so since), though, the car feels FAST. Every gear, all RPM's. Is it possible the ECU figured out what was going on and adjusted something to compensate? I've heard the ECU "adjusts" to an underdrive pulley, so it could do the same for this I suppose.

Any thoughts?

snowman2155

I don't know, but I guess it's possible. How would I be able to tell if that's why, and how could I fix it? Thanks

jakew8

when you say "it didn't do anything," what do you mean? you mean they still click? if you know you did the procedure right, maybe your noise isn't the vtc's. maybe you just have really sticky lifters or it could be some aspirator valve. try using CD2 "quiets lifters" formula when you change your oil.

cneary812

I have a quick disconnect set on my VTC Selanoid. If I don't feel like idoling all over the spectrum I disconnect my ground and run it till the ticking drives me insane, then I reground it. My timing is advanced and my car actually runs better grounded than not but the idol is what it is.
Snowman, you may have a broken exhaust stud if you still hear ticking.

keener

I talked with Nissan and they said quite often they only have to replace the springs. Supposedly the spring is of low gauge but you couldn't tell unless comparing the two(stock and new one) side by side. This usually saves $350 in sprocket costs. Springs are $50 and 8 hours of labor. Also, Nissan said they can hook up to the computer and turn the VTC's off to determine if the VTC's are the problem, so maybe this would be an option for snowman. I also asked if they could be turned off indefinetly and he said you would loose torque or horsepower depending on retardation or advancement, but there would be no real harm in turning off the VTC's. BTW, has anyone done this job themselves? If so, where did you get the special tools?

snowman2155

I mean they still click, but maybe your right, it might be something else. Where can you get this CD2 stuff. Thanks for your help

snowman2155

Thanks for all your help guys. I will look into it more & see what I can figure out.

cneary812

when they click do they only do it for a few seconds or all the time? Is it at low RPM's or high? it makes a difference.

snowman2155

It clicks only when It's been sitting for a while(45 min. or longer normally). That's what makes me think it's the vtc's. It only clicks until the engine warms up, then it quits. Could also just be lifters, but how much noise can a lifter make?

cneary812

The VTC sound is very distinctive high pitch ticking that stops at higher RPM's and if you ground them out it will stop almost instantly. If you have a broken exhaust stud (very likely) it sounds very simelar but won't go away when vtc's are grounded. Check your exhaust manifolds to see how many studs you have left

snowman2155

I'll do that then. Thanks a lot.

jakew8

sounds like my vtc issues were a little different than other people's. my vtc clacked whenever the engine "wasn't working hard." what do i mean? a) whenever it was in neutral, regardless of rpm. b) in low gears above, maybe, 2500 rpm. i.e., when the car wasn't working hard to accelerate. they would shut up in second and third gears at low rpm's when the engine was encountering the car's inertia. does that make sense?

anyhow once i grounded them, they haven't made a peep so i know that's what the noise was.

oh and cd2: get it at autozone or walmart. those are the two places i've seen it near me. comes in a yellow plastic bottle with an elongated neck. one caveat: i added it once between oil changes (not just during) and i think that was *too much* cleaning b/c my crank seal started to leak. it has since stopped.

ljbrew001

My service manual shows that the wire is Y/G, which is yellow with a green stripe.

Maxdout

can anyone show a pic or direct me to the VTC solenoid?

cneary812

it is the wire with the yellow in it, just cut it open and look!

Michael

iTrader: (21)

read the little message below your name. In the FAQs there is a link to craig braces site that has the directions of grounding the vtcs with pics and all.