Stock Evo With Atmospheric BOV
Thread Starter
Newbie
Joined: Feb 2016
Posts: 18
Likes: 1
From: Wisconsin
Stock Evo With Atmospheric BOV
Hi, I bought a Evo 8 recently and it's all stock besides an atmospheric BOV (unknown brand) would this cause poor idling? My idling is pretty bad at times, the rpms drop really low then they'll rise up quite a bit. Would it be because of the BOV or would something else be causing this?
Newbie
Joined: Nov 2010
Posts: 4
Likes: 0
From: SoCal
If the BOV has a spring in it light enough that it hangs open a little bit at idle, then yeah it'll cause it to run poorly as long as it's open loop.
Like the guy above said, just recirculate it. You won't gain anything going VTA stock, and it'll run worse.
Like the guy above said, just recirculate it. You won't gain anything going VTA stock, and it'll run worse.
Lightly sprung BOV's are open at idle. You need to recirculate it. Your car is on MAF, so your dumping metered air out of the BOV and confusing the ECU. Either get a speed density tune, or recirculate the BOV.
Thread Starter
Newbie
Joined: Feb 2016
Posts: 18
Likes: 1
From: Wisconsin
couple of nooby questions.
1. Could this also cause the service vehicle soon light to be on?
2. How would I go about recirculating the BOV? Or would I be better off going back to a stock 8 BOV or getting an Evo 9 BOV?
1. Could this also cause the service vehicle soon light to be on?
2. How would I go about recirculating the BOV? Or would I be better off going back to a stock 8 BOV or getting an Evo 9 BOV?
Trending Topics
1.it possibly could, the venting of air messes with the maf sensor.
2.if your bov has a connector or adapter that can convert it to a recirculating type then go for that my old gfb bov had a trumpet block adapter if i wanted it to fully recirculate. on that note i would suggest going back to stock or getting a metal evo9 valve as those will handle any horsepower you throw at it unless you get a little crazy and the driveability benefits of the stock piece really outweigh all the vent to atmosphere choices.
Thread Starter
Newbie
Joined: Feb 2016
Posts: 18
Likes: 1
From: Wisconsin
my answers to questions
1.it possibly could, the venting of air messes with the maf sensor.
2.if your bov has a connector or adapter that can convert it to a recirculating type then go for that my old gfb bov had a trumpet block adapter if i wanted it to fully recirculate. on that note i would suggest going back to stock or getting a metal evo9 valve as those will handle any horsepower you throw at it unless you get a little crazy and the driveability benefits of the stock piece really outweigh all the vent to atmosphere choices.
1.it possibly could, the venting of air messes with the maf sensor.
2.if your bov has a connector or adapter that can convert it to a recirculating type then go for that my old gfb bov had a trumpet block adapter if i wanted it to fully recirculate. on that note i would suggest going back to stock or getting a metal evo9 valve as those will handle any horsepower you throw at it unless you get a little crazy and the driveability benefits of the stock piece really outweigh all the vent to atmosphere choices.
Thread Starter
Newbie
Joined: Feb 2016
Posts: 18
Likes: 1
From: Wisconsin
my answers to questions
1.it possibly could, the venting of air messes with the maf sensor.
2.if your bov has a connector or adapter that can convert it to a recirculating type then go for that my old gfb bov had a trumpet block adapter if i wanted it to fully recirculate. on that note i would suggest going back to stock or getting a metal evo9 valve as those will handle any horsepower you throw at it unless you get a little crazy and the driveability benefits of the stock piece really outweigh all the vent to atmosphere choices.
1.it possibly could, the venting of air messes with the maf sensor.
2.if your bov has a connector or adapter that can convert it to a recirculating type then go for that my old gfb bov had a trumpet block adapter if i wanted it to fully recirculate. on that note i would suggest going back to stock or getting a metal evo9 valve as those will handle any horsepower you throw at it unless you get a little crazy and the driveability benefits of the stock piece really outweigh all the vent to atmosphere choices.
yea go for that one but i do regularly see them on sale here in the forum if you dont wanna pay that
Thread
Thread Starter
Forum
Replies
Last Post
BlackOperative
Evo Engine / Turbo / Drivetrain
5
Apr 6, 2012 09:38 AM
highhats
For Sale/WTB - Engine / Drivetrain / Power
2
Sep 3, 2008 08:59 PM