Anyone know if Auto Zone will be able to detect if my VIAS is busted? My SES light won't light up, will it?

 

I think the only thing that will throw a code having to do with the intake manifold is the swirl control system (cali spec only).

 

i remember reading all the threads started by maxgator about his busted VIAS and i dont remember him saying it threw a light. his was busted and fixed by nissan. i thought for a while mine was having the same troubles, so i dissconneted my VIAS and ran the car. it was definately slower up top. all though after i disconnected and reconnected it, i could hear it switch over much better. maybe i was just listening harder but there was a difference. i wanted to run a similiarly equipped maxima but there is not one close enough to test.

 

Any idea where to disconnect it?

 

On the passenger side of the engine in the front, there is a box with two vacuum lines going into it... Underneath is the connector...

 

asu, if you ever head down to cali... we can run to see if yours is broken

 

In the front? Like where? Show me in the pic.??

 

Well if you don't know how your varible intake system works, it's gonna be hard to check it(especially when you don't know where the mechanism is). I don't think it will throw a code because it's not really directly related to the emmissions.

You should really invest in a manual.

 

I have one. I'm ADHD and I hate reading. Damn. Guess I need to pick it up tonight from 2k2_6spd's house.

 

ADHD?

 

attention deficit hyper disorder
i dont know how quick he would be to respond but pm maxgator, he took the time to walk me through the messages. i also plugged it up with a rubber cap to keep anything from going in.

 

Found it....
http://forums.maxima.org/showthread....ve+vias+thread

 

before you try to run it disconnected, have you ever had any trouble actually hearing it switch over at 5k? the 2k2's, at least blubyu2k2's has a different tone when his switches over. mine is more high pitched while his is more a grunt. its difficult to hear over the intake but i was curious if you hear yours switch over?

 

Broken VIM doesnt throw a code.

To test it look under the box type object on the right side of the intake manifold. Have a friend rev the car to WOT and see if the lever actuates.

 

ACtually, you can just push the throttle bar by hand inside the engine bay. Should pop open at about 3000-5000 rpm

 

That you can, but its hard to do look for the VIM actuator and rev the engine.......if you have never done it before.

It actually should open around 5000-5400 rpms IIRC.

 

Check the damn thing already asu - how long has it been now?

Vias won't throw a code. And . . . according to Nissan that means there must not be anything wrong.

Of course, I had to PROVE to them that the vias could be turned off.

 

Well on my VE 3-gen it's really easy. I think the 2k2's set up is relatively the same(actuator location and throttle pulley location). Just rev the throttle and look left.

 

im sure im not the first and im sure i wont be the last but when i had my VIAS disconnected, i was wondering it was possible to change the point at which it switches. i would assume its sets at an optimal point but thats is with a stock car. with certain bolts on that allow more air in and more air out, could adjusting the switchover provide any benefit and is it even feasible or possible?

 

I can back this up- Just went out to my car in a 35F howling north wind (we dumb Texans do not handle cold weather!)- If you look at the bottom of the VIAS, there is a little rod that pulls on a pivot to open the VIAS flap inside the intake- when you rev the engine the thing pops open right at 5K rpm's! I guess mine is working!

 

You really would think that a busted VIAS would throw a code, because without it, it significantly reduces the engine's power. Honda's throw a code when a VTEC solenoid is malfunctioning, but this is a very very rare occurance when it happens.

Hmm...on the otherhand, when the Acura CL-S came out, they apparently had some problems with busted actuators also, and they didn't get a code for that...

 

As far as I know, no one on the board has reported a problem with the solenoid. I suppose that if that happened a code might be thrown.

But the problem with the VIAS has typically been that the solenoid/vacuum etc all work, and the VIAS APPEARS to work if you watch the actuator flip BUT there is a mechanical failure in the enclosed intake manifold that prevents the butterflys from opening (or closing) as the case may be.

Trust me, Nissan wouldn't even believe my dyno that showed 40hp to the wheels loss because there was no code.

 

Mine is broken. See other thread.