i took a video of my VIAS valve...it opens at weird times i thought only after 5k RPMS...i have the video here.. http://media.putfile.com/P1010778

 

it opens after 5k.......

 

www.putfile.com

 

no it doesnt it seems to open whenu slam on the gas before 5K just watch it when i get it on here

 

ok well here is the link to my VIAS video.. http://media.putfile.com/P1010778 put ur speakers on too...it comes on WAY before 5K so i dont know wat u guys are talking about..

 

i thought it was like 4K

 

00-01 switchover is at 5000
02-03 is at 4xxx

 

i can feel mine kicking in... like mAD vTAK y0...

like right after 4K ish (per tach).


why dont you run the paper test?

 

I think I felt mine for the first time today.... I had to to pass a semi which was kinda going all over the Florida Turnpike....... kinda fun to hear it sucking in........ then I saw a 3.5 doing the same thing BUT WAY FASTER ........

 

so why doesnt it just stay open all the time? im thinking gas mileage would be worse...

 

i watched it again and tried it again and it Definetly opens up way before 4*** K rpms. i think whenever there is high vacuum pressure it sucks the valve open (EG when you gun it) cuz at high rpm when i gunned it it didnt open...

 

Don't do quick jabs on the pedal like that. Get the needle to gradually rise up and see where it triggers.

 

run the paper test.

 

Yeah my new 5th gen is having the same problem, Everytime i get on the gas at about 3500rpm you can feel a change in it acceleration. seem like the VIAS kick in to way early before 5000rpmbecause it make the car accelerate sooooo slow. has anybody found out what this problem is???? is it the MAF??? HELP and what is a paper test?

 

mine been doing the same, seems around the 3500-4000 range, theres like a kick/pause in power

 

Yep that is exactly what its feels like! Feel like i lost most of my powerband. Its pissing me off because it make my maxima extremely slow. I'm hoping its just my MAF so i can replace it with an new updated one.

 

anyone with a possible vias test could easily see it on a dyno. get 3 pulls with a/f and go from there. this is of course if you do not want to simply open it up to check to see if the cup is broken loose. in this case, the outside function would appear to work but nothing going on inside.

 

I have already done the VAIS Fix but that didn't fix the problem. It has to be somthing else....

 

did you check the clock the rod. the cup may have been broken but when you fixed it, the power valve could have been clocked incorrectly.

 

If you are losing power at those RPMS (3500 +) its probably ur MAF. I used to have a 2K not too long ago and when i put a new MAF sensor in...it was like night and day. soo much faster.

 

Actually, now that I have a 2002 auto, despite the extra features, I WANT MY 2K BACK. the stick was soo fun. but yea. thats off topic just had to say it.

 

you guys dont know about the paper test??!

crap... the MX6 guys were all over that one.


...meh, anyway...

tear a small piece of paper, newspaper, whatever and put it between the lever and where it contacts the stop, on the IM.

got for a drive, if the paper is gone, VRIS () is activating...

if you think its activating at 3K when its supposed to go at 5K, them you go for a WOT pass and take it to 4200 or so...

and ck the paper. if its gone, something is wrong... however... in order to open, the ECM has to actuate the solenoid. unless the solenoid is leaking or something.

 

so the VIAS is electronic? I thought it was just simply mechanical.

 

what lever are you talking about? what's WOT?

 

theres a stop lever that contacts the manifold, on the 5.5 anyway. WOT = wide open throttle.

uses a solenoid to control a vacuum signal that controls a diaphragm that opens a butterfly set.

so its electronic, pneumatic, and mechanical.

 

sorry to continue to beat this dead horse, but Ive searched and have not found...So the 5.5's do or do not have the VIAS?

Thanks

 

the 3.5 does have a vias system but it is completely different than the 3.0 setup. it also activates at a lower rpm.

 

i just managed to fix my problem. i dont know how, all i did was tkae off the vais assebly off the side of the im, make sure everyhting was workign properly, theres nothing at all wrong with mine, even tho it wasnt worign b4, spun the power rod to make sure it was spinnign smoothly and put eveythignack together, now it works, doesnt make sence, but it works now. also remover the restrictor plate behind the tb also wanted to see if it did anything. little more whislte but nothing other than that.