Can anyone point me in the right direction on my boost?

Stupra · 09-02-2008, 07:37 PM

the only real diagram I have is in my head lol. I could try to help you through pictures? The reason I asked about the BOV is beacause if it's a stock BOV and it's not recirculating back into the intake, you're basically causing yourself a large vacuum leak. I learned this the hard way.

fienloco · 09-02-2008, 11:27 PM

Ok. The BOV is stock. Now what your telling me if I am correct is the vacuum line that is on the stock turbo loops from the turbo to the actuator/BOV. Right? Then off the intake boot down to the power steering pump off there across the front of the engine up the intake side to the I forget what its called on the fuel rail so the whatchamajigger (pressure regulator?) then into the intake. Correct? Thats how mine is ran off the top of my head. When you recirculating to the intake. I guess I would need an example or explanation. Im not interpreting how to do that. If its not like that stock. Anyway. Appreciate the help hope to hear back on this one.

Stupra · 09-03-2008, 02:16 AM

Quote:

Originally Posted by fienloco

Ok. The BOV is stock. Now what your telling me if I am correct is the vacuum line that is on the stock turbo loops from the turbo to the actuator/BOV. Right? Then off the intake boot down to the power steering pump off there across the front of the engine up the intake side to the I forget what its called on the fuel rail so the whatchamajigger (pressure regulator?) then into the intake. Correct? Thats how mine is ran off the top of my head. When you recirculating to the intake. I guess I would need an example or explanation. Im not interpreting how to do that. If its not like that stock. Anyway. Appreciate the help hope to hear back on this one.

There is a short vacuum line that loops from the turbo to the actuator NOT the bov. The bov should have it's own vacuum source that comes across the top of the engine from the intake manifold. Now the power steering one is completely different. It comes off the bottom of the accordian hose(intake boot) into the pump, across the front of the engine and so forth. Yeah if everything is stock then your bov should be in between your 3000 pipe and your accordian hose. If you have left this stock then you should be ok. A lot of guys leave the intake side of the bov open hoping the get a better swoosh but this will make your car run bad under vacuum(idle) and lets un-metered air through which is basically a giant vacuum leak. That's why I asked. Keep pluckin away man! And make sure your boost gauge has a reliable vacuum source too. Because that would suck if it was just reading wrong this whole time!

fienloco · 09-03-2008, 03:48 AM

Right on. It is what its supposed to be if Im putting the info to my brain correctly. Now that I believe it is the issue this whole time. Because she spools blows of the steam. You know what I mean. My ? on the the vacuum now is the Turbo Pressure Assy. on the driver side inner fender the vacuum line runs from there to the cruise control acuator along the firewall T's into the intake nipple across the firewall to the heater vacuum somn or other I have looked and looked and asked trying to find where or what I'm missing because I believe my problem lies amongst that road. ????

mkiiisupra · 09-03-2008, 07:07 AM

Cygnus X1 Home Page

Vaccum line diagram

Stupra · 09-03-2008, 09:13 AM

Quote:

Originally Posted by fienloco

Right on. It is what its supposed to be if Im putting the info to my brain correctly. Now that I believe it is the issue this whole time. Because she spools blows of the steam. You know what I mean. My ? on the the vacuum now is the Turbo Pressure Assy. on the driver side inner fender the vacuum line runs from there to the cruise control acuator along the firewall T's into the intake nipple across the firewall to the heater vacuum somn or other I have looked and looked and asked trying to find where or what I'm missing because I believe my problem lies amongst that road. ????

Yeah read check that diagram posted above it's a good one and easy to understand. Make sure everything looks right. If your boost gauge is reading correctly then it's definitely a vacuum problem. Like I said you should have somewhere around 20 pounds of vacuum pressure at idle

Bill UK · 09-07-2008, 09:42 AM

This is the stock set up for the BOV, the bov valve fitted is a SAAB bov half the price and more reliable, fitting instructions and lots of info HERE Click on modifications (left side of page) and then scroll down to SAAB Blow of Valve.

09-03-2008, 07:07 AM	#5
mkiiisupra Lexus & 550's Join Date: Sep 2007 Location: Las Vegas, NV Posts: 570 Blog Entries: 1	Cygnus X1 Home Page Vaccum line diagram __________________ 1990 Toyota Supra Turbo A/T ------------------------------------------------ Questions about oil? take a look http://www.supramania.com/aehaas/

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09-02-2008, 07:37 PM	#1
Stupra Intake Join Date: Sep 2008 Location: Lacey, WA Posts: 37	the only real diagram I have is in my head lol. I could try to help you through pictures? The reason I asked about the BOV is beacause if it's a stock BOV and it's not recirculating back into the intake, you're basically causing yourself a large vacuum leak. I learned this the hard way.

09-02-2008, 11:27 PM	#2
fienloco Intake Join Date: Apr 2008 Location: Pueblo,CO Posts: 33	Ok. The BOV is stock. Now what your telling me if I am correct is the vacuum line that is on the stock turbo loops from the turbo to the actuator/BOV. Right? Then off the intake boot down to the power steering pump off there across the front of the engine up the intake side to the I forget what its called on the fuel rail so the whatchamajigger (pressure regulator?) then into the intake. Correct? Thats how mine is ran off the top of my head. When you recirculating to the intake. I guess I would need an example or explanation. Im not interpreting how to do that. If its not like that stock. Anyway. Appreciate the help hope to hear back on this one.

09-03-2008, 03:48 AM	#4
fienloco Intake Join Date: Apr 2008 Location: Pueblo,CO Posts: 33	Right on. It is what its supposed to be if Im putting the info to my brain correctly. Now that I believe it is the issue this whole time. Because she spools blows of the steam. You know what I mean. My ? on the the vacuum now is the Turbo Pressure Assy. on the driver side inner fender the vacuum line runs from there to the cruise control acuator along the firewall T's into the intake nipple across the firewall to the heater vacuum somn or other I have looked and looked and asked trying to find where or what I'm missing because I believe my problem lies amongst that road. ????

09-07-2008, 09:42 AM	#7
Bill UK AEM EMS Join Date: Jul 2006 Location: UK Posts: 891	This is the stock set up for the BOV, the bov valve fitted is a SAAB bov half the price and more reliable, fitting instructions and lots of info HERE Click on modifications (left side of page) and then scroll down to SAAB Blow of Valve.