blow-off problem

cre · 12-23-2011, 05:59 AM

By the way, I also believe the lower port on that BOV needs to be connected to a boost reference (A vacuum port BEFORE the throttle body.).

Life is Supra · 12-27-2011, 12:36 AM

I try the way u sad and its working very well.

Steel its not that noisy but it shouldnt be because my boost pressure is stock(0.6bar)

Life is Supra · 01-03-2012, 01:24 AM

Hi again,like I said the BOV vent and works good but now I have a problem with large rpms in neutral(1500-1600).Please help me i dont know what to do

cre · 01-03-2012, 04:37 AM

Check for vacuum leaks, test the air flow meter and if the BOV is still venting to atmosphere check to see if it's staying open while the system is in vacuum (not boosting). Check for any stored diagnostic codes too (see the MKIII FAQ section for info on how if you don't know already).

Life is Supra · 01-03-2012, 01:55 PM

I think its bov stays open a bit when theres no boost.A nd I sound stupid to u,but what shoud I do now?Where to look and does the bov have a issue and because of that stays open or I have to close it a little?I didnt check codes,but last time I check it there was just one-I think 52 for a/c that is on.

cre · 01-04-2012, 04:32 AM

Code 52 is a knock sensor circuit malfunction and will cause severe operational problems. Code 51 indicates that either the A/C is in operation or the IDL switch in the TPS is open and is not a critical code although you should make sure that the error was indeed because the A/C was on or the throttle was open.

FYI - you can not set the timing with any codes present.

If the BOV is remaining open then you either have the spring too loose, the vacuum lines are not properly routed or the BOV is damaged. With a recirculating setup it isn't an issue at all as long as it's closed when boosting... one more win for recirculating.

Awyman18 · 01-07-2012, 01:10 AM

sell the bov and just get a simple bosh bpv........thats wat i have, its loud, sounds epic, and it works amazing. the only thing u have to do is stretch the hoses over the bosh ends because its bigger then normal hoses. and there also cheap. idk if that's the Bosch 110 or the 102 in the pic but the Bosch 110 has a stiffer spring, which is good because the 102 has been known to leak due to a weak spring, but i know a guy who is boosting 19psi on his mk3 with a Bosch 110 and works great. Just a thought i guess, good luck anyways!

like that one

12-23-2011, 05:59 AM	#1
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	By the way, I also believe the lower port on that BOV needs to be connected to a boost reference (A vacuum port BEFORE the throttle body.). __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

12-27-2011, 12:36 AM	#2
Life is Supra 3" Exhaust Join Date: Apr 2010 Location: Serbia Posts: 51	I try the way u sad and its working very well.Steel its not that noisy but it shouldnt be because my boost pressure is stock(0.6bar)

01-03-2012, 04:37 AM	#4
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Check for vacuum leaks, test the air flow meter and if the BOV is still venting to atmosphere check to see if it's staying open while the system is in vacuum (not boosting). Check for any stored diagnostic codes too (see the MKIII FAQ section for info on how if you don't know already). __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

01-04-2012, 04:32 AM	#6
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Code 52 is a knock sensor circuit malfunction and will cause severe operational problems. Code 51 indicates that either the A/C is in operation or the IDL switch in the TPS is open and is not a critical code although you should make sure that the error was indeed because the A/C was on or the throttle was open. FYI - you can not set the timing with any codes present. If the BOV is remaining open then you either have the spring too loose, the vacuum lines are not properly routed or the BOV is damaged. With a recirculating setup it isn't an issue at all as long as it's closed when boosting... one more win for recirculating. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

01-07-2012, 01:10 AM	#7
Awyman18 3" Exhaust Join Date: Apr 2011 Location: columbus Posts: 151	sell the bov and just get a simple bosh bpv........thats wat i have, its loud, sounds epic, and it works amazing. the only thing u have to do is stretch the hoses over the bosh ends because its bigger then normal hoses. and there also cheap. idk if that's the Bosch 110 or the 102 in the pic but the Bosch 110 has a stiffer spring, which is good because the 102 has been known to leak due to a weak spring, but i know a guy who is boosting 19psi on his mk3 with a Bosch 110 and works great. Just a thought i guess, good luck anyways! like that one Last edited by Awyman18; 01-07-2012 at 01:26 AM.

01-03-2012, 01:24 AM	#3
Life is Supra 3" Exhaust Join Date: Apr 2010 Location: Serbia Posts: 51	Hi again,like I said the BOV vent and works good but now I have a problem with large rpms in neutral(1500-1600).Please help me i dont know what to do

01-03-2012, 01:55 PM	#5
Life is Supra 3" Exhaust Join Date: Apr 2010 Location: Serbia Posts: 51	I think its bov stays open a bit when theres no boost.A nd I sound stupid to u,but what shoud I do now?Where to look and does the bov have a issue and because of that stays open or I have to close it a little?I didnt check codes,but last time I check it there was just one-I think 52 for a/c that is on.

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