No Boost!! Help! - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

stillen · 05-31-2008, 06:32 PM

Hi everybody. I need help. I have an s14 sr20det with Greddy RS blow off valve and Apexi AVCR boost controller. The boost controller was set to 1bar with solenoid duty cycle of 62%. I was always getting 1bar of boost reading on the boost controller screen. My Greddy blowoff valve is recirculated because it was leaking, anway regardless I was getting 1bar on the boost controller and then suddenly today not getting more than 0.78bar, no settings were changed. I checked all the vacuum lines and there are no holes or leaks.

Any suggestions for a quick fix or something I am missing? Thanks guys

BTW I don't have a separate boost gauge, I use the reading on the AVCR boost controller.

*fliprayzin240sx* · 05-31-2008, 06:58 PM

If you know your BOV is leaking, why would you still want to push 1bar? Just cuz your boost gauge says 1 bar does not equate for how much the turbo is making up for the leak. This is one of the easiest way to blow a turbo by pushing it way pass its capability.

So my guess is either you have a new leak or your BOV is leaking more. Go pressurize the whole system and see if you have a leak somewhere else.

stillen · 05-31-2008, 11:19 PM

You make an excellent point about blowing up my turbo with a leaky BOV, but the fact that it is recirculated, does it still make a difference? Is that the reason why I don't have any boost that it is leaking more?

Greddy parts SUCK, that BOV I bought it new and used it for 6 months and then started leaking.

Thanks for your input.

*fliprayzin240sx* · 06-01-2008, 01:04 AM

Doesnt matter if your recircing it or not...the turbo is still over exerting itself.

05-31-2008, 06:32 PM	#1
stillen Leaky Injector Join Date: Dec 2006 Location: USA Posts: 60 Trader Rating: (0) Feedback Score: 0 reviews	No Boost!! Help! Hi everybody. I need help. I have an s14 sr20det with Greddy RS blow off valve and Apexi AVCR boost controller. The boost controller was set to 1bar with solenoid duty cycle of 62%. I was always getting 1bar of boost reading on the boost controller screen. My Greddy blowoff valve is recirculated because it was leaking, anway regardless I was getting 1bar on the boost controller and then suddenly today not getting more than 0.78bar, no settings were changed. I checked all the vacuum lines and there are no holes or leaks. Any suggestions for a quick fix or something I am missing? Thanks guys BTW I don't have a separate boost gauge, I use the reading on the AVCR boost controller.

05-31-2008, 06:58 PM	#2
fliprayzin240sx Man w/ CTSV & a Car Seat Join Date: Aug 2002 Location: Tampa Posts: 17,998 Trader Rating: (19) Rides Gallery: fliprayzin240sx Feedback Score: 19 reviews	If you know your BOV is leaking, why would you still want to push 1bar? Just cuz your boost gauge says 1 bar does not equate for how much the turbo is making up for the leak. This is one of the easiest way to blow a turbo by pushing it way pass its capability. So my guess is either you have a new leak or your BOV is leaking more. Go pressurize the whole system and see if you have a leak somewhere else. __________________ If you think Zilvia has too many assholes... CLICK HERE!!!

06-01-2008, 01:04 AM	#4
fliprayzin240sx Man w/ CTSV & a Car Seat Join Date: Aug 2002 Location: Tampa Posts: 17,998 Trader Rating: (19) Rides Gallery: fliprayzin240sx Feedback Score: 19 reviews	Doesnt matter if your recircing it or not...the turbo is still over exerting itself. __________________ If you think Zilvia has too many assholes... CLICK HERE!!!

05-31-2008, 11:19 PM	#3
stillen Leaky Injector Join Date: Dec 2006 Location: USA Posts: 60 Trader Rating: (0) Feedback Score: 0 reviews	You make an excellent point about blowing up my turbo with a leaky BOV, but the fact that it is recirculated, does it still make a difference? Is that the reason why I don't have any boost that it is leaking more? Greddy parts SUCK, that BOV I bought it new and used it for 6 months and then started leaking. Thanks for your input.