help, check engine light on after bov installed.

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#11

10-31-2009, 04:40 PM

yoga129

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Thread Starter

Join Date: Oct 2009

Posts: 4

Quote:

Originally Posted by ghost6303

you can use a BOV without problems if its adjusted correctly and closed at idle. most people have a hard time figuring out how to do this, which is why a DV is a better choice. there is no performance gain using a BOV vs a DV on the stock turbo. unless you have a real reason to use one, stick with a DV so i dont have to keep reading these threads.

i dont really care about performance, i dont race anyway. its just sounds cool. its enough reason for me. do you know how to adjust bov?

#12

10-31-2009, 07:02 PM

TeeterTawter

2nd Gear

Join Date: Mar 2006

Location: Sauga

Posts: 1,358

I have the exact same valve as you, the forge splitter, you can only make it full dv, full bov, and hybrid 50 50.
you can adjust how stiff the valve spring is by turning the top, here for more details http://www.forgemotorsport.com/conte...duct=FMDVSPLTR

#13

10-31-2009, 08:20 PM

2fast4u66

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Join Date: Mar 2009

Location: littleton, CO

Posts: 185

has anyone tried our maf inline, after the bov/dv?

#14

10-31-2009, 11:09 PM

ghost6303

3rd Gear

Join Date: Oct 2007

Location: CT

Posts: 2,158

Quote:

Originally Posted by dragonrage

No... because your MAF measures the air the car is taking in and it does not account for what the BOV is blowing off.

it takes about 100-500 milliseconds to shift for the normal person. running rich for that small amount of time is inconsequential. quite a few people use BOVs without problems. as long as it is closed at idle and only opens when you shift, its fine.

Quote:

has anyone tried our maf inline, after the bov/dv?

like putting the MAF after the turbo? that would not work because the MAF reads air speed not volume. the ECU computes the volume by measuring the air speed, plus the known size of the MAF opening plus the atmospheric pressure. if you put the MAF after the turbo that would change the atmospheric pressure and the ECU would not know whats going on.

#15

10-31-2009, 11:49 PM

bradtyler02

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Join Date: Aug 2009

Location: Fort Irwin, CA

Posts: 5,312

I think the lesson here for all (and we'll all have to say it all again very soon) is that having a BOV just for the "cool sound" is pretty ricey. Honestly, if it is such a hassle, possibly damaging, and the car was designed with a DV, just stick with a damn DV!

#16

11-01-2009, 01:19 AM

dragonrage

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Join Date: Sep 2009

Location: Massachusetts

Posts: 1,465

Another problem with putting the MAF after the turbo is that the oil that gets by the turbo will coat the MAF and make it need frequent cleanings.

#17

11-02-2009, 04:36 AM

yoga129

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Join Date: Oct 2009

Posts: 4

Quote:

Originally Posted by bradtyler02

I don't mean to be rude but, why you talk about dv, bov sound and bla bla bla. I am trying to get an alternative to make bov works fine not to argue dv is best or the damage to a car.

#18

11-02-2009, 06:43 AM

bradtyler02

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Join Date: Aug 2009

Location: Fort Irwin, CA

Posts: 5,312

Quote:

Originally Posted by yoga129

i have audi a4 b5 1998 1.8t automatic. i change the stock dv to the forge splitter and i set 100%bov. for the first week it runs good and no problem. but on traffic stop and go, sometime my rpm drop very low and causing engine stall. the check engine light also showing. is there anyway to fix this?

I don't mean to be rude, but you asked how to fix it... If you don't like the answers, don't ask the question...