[iWISHihadaSUPRA]

When ever i rev my car past 2.5k or 3k, and then put it on neutral, my car just dies...i dont understand why...is it cuz my blow off valve is realeasing too much air, then shutting off the throtle?? i don't know what?? help!!

 

[Josh S]

do you have a aftermarket BOV venting to ATM?

BTW this should be in the TECH section

 

[iWISHihadaSUPRA]

it's an aftermarket zen BOV...no, it's not venting to the atmosphere, it's underneath the hood

 

[Josh S]

I know it's under the hood...but when it vents boost does it go back into the intake or not? If not and you are running the stock MAF that is your problem

 

[iWISHihadaSUPRA]

my zen BOV, if you ever heard of it, is facing my intake or filter...and yah i still have a stock MAF....do you mean whatever my BOV releases does my filter suck it up??

 

[Josh S]

With the stock BOV, boost is vented back into the intake pipe after the MAF. This is important because this are has already been measured by the MAF. I think that your BOV is venting boost to the outside, and not back into the intake after the MAF. If this is the case, the car will "loose" air that has already been measured. When this happens the ECU will inject enough fuel to go with the air that was measured, but since it was loost you will run very rich for a moment and stall out.
Check out the pictures of the stock BOV and the dual BOV mod on mkiv.com if you don't know how the stock BOV is routed.

 

[iWISHihadaSUPRA]

so what would you recommend doing with my setup?? like if i still wanted to have an aftermarket BOV, without any stalling??

 

[Ranger498]

lol funny ...what bov do you have mabe its to wide open !did you try to adjust it ?

it's an aftermarket zen BOV...no, it's not venting to the atmosphere, it's underneath the hood

 

[iWISHihadaSUPRA]

i have a zen BOV...and yah, when i drive it normally...i can hear the BOV already, it's pretty loud, i think it's letting out too much air or something...i dont' know how to adjust this BOV...i never had a zen BOV

 

[BrianJ]

it's an aftermarket zen BOV...no, it's not venting to the atmosphere, it's underneath the hood

no offense, but that's funny.

so what would you recommend doing with my setup?? like if i still wanted to have an aftermarket BOV, without any stalling??

You'll need a VPC or HKS AFR.

 

[iWISHihadaSUPRA]

so if i get one of these programs, or similar to it, i can keep my aftermarket BOV, and leave the stock MAF on??

 

[Alaskan]

The VPC replaces the stock MAF.

 

[iWISHihadaSUPRA]

oh i see, but damn, they're so expensive

 

[iWISHihadaSUPRA]

is there anything else i can do without having to spend like a G for one of those?? maybe can i change my BOV to one i can adjust so it won't release so much pressure??

 

[Josh S]

did this ZEN BOV replace the stock BOV? you migh be able to get away with running the stock BOV in parallel with your aftermarket BOV, but I know nothing about the ZEN. Also you could get the HKS SSBOV which comes with a supra kit to properly route back into the intake.

 

[Supreme]

My suggestion would be to get the HKS s-AFR. It only runs about $350 or so and it is truly a great product. It will solve you idle problem, because it has a feature that adjusts for BOV venting. In addition, you should be able to pick up anywhere from 10-40 rwhp with it because it will allow you to tune your air/fuel mixture which probably isn't optimum.

$$$ for $$$ a much better mod than the VPC at your your modification level.

 

[iWISHihadaSUPRA]

i guess i'm just going to change it to the HKS one...i hear a lot of good things about it

 

[logb17]

What car do you have, you wish you had a supra??? So what do you have then. Anways, your BOV is probably adjustable. Its probably set to loose. It is probably staying open at idle and sucking in unmetered air. Also you will be running a little rich between shifts if you dont vent back into the intake. Youll spit shit out of your muffler when shifting, may decrease spool time, unless really moded.

 

[logb17]

I laughed my ass off haha, "Its under the hood" hehehe no shit.

 

[iWISHihadaSUPRA]

lol, i know, im a newbie...but yah, ur exactly right, every time i shift, i seem to shift rich, and shit comes out my exhaust....also there seems to be a lag i think on my first gear, i don't feel that strong pull like the other gears...could that be another problem cuz of my BOV??