sr help! most likely boost leak! - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

nissan240 · 05-12-2009, 02:53 AM

i was driving home the other night from work and all of a sudden my car started bogging, sputtering. i stopped checked it out for any leaks and seems fine then i drove the car home bogging sputtering the whole way home! this morning i turned my car on i notice my vacumm is at -10psi, if i am correct it should be sitting at -20psi. i checked intercooler piping, i've swapped fuel injectors, fpr, checked all vaccumm lines and still nothing! it just gotten worst this morining so bad that i cant even drive my car. could it be that my bov can cause this massive leak or my boost controller seloniod? or is problem somewhere else?

*fliprayzin240sx* · 05-12-2009, 05:43 AM

Pressurize the system...you have a leak somewhere...

nissan240 · 05-12-2009, 12:18 PM

how would i pressurize the system? also could it be my spark plug? ngk iridium heat range 8! my motor is built stage one port and polish on intake side, stage 2 on turbo side, i got camshafts, springs, retainers, guides, pistons rods etc. etc.

*fliprayzin240sx* · 05-13-2009, 09:41 AM

If your still running a stock turbo, you dont need 8s. Get some 7s and make sure theyre gapped .028-.030.

nissan240 · 05-13-2009, 02:22 PM

i have a hks gtrs turbo.

littlegreenmonstor · 05-13-2009, 06:00 PM

have you looked for a vacum leak with starter fluid you spray them intake where the head meets and if you notice it pick up than it's intake manifold leak

*teamsprock* · 05-14-2009, 12:10 PM

An easy way to pressurize the intercooler piping is go buy a PVC hose end that is the same size as your intercooler, drill a hole in the center and install a valve stem. All of this should cost you a few bucks. Then unhook the turbo and place the PVC hose end in the coupler and tighten the hose clamps. Then add pressure using an air compressor or go to the closest gas station and use the tire station. Then listen for leaks. This will only tell you if you have a boost leak, for vacuum you need to test the intake mani side.

nissan240 · 05-15-2009, 02:38 AM

sweet thanks teamsprock! i will try that this weekend, and will keep you guys updated!!

05-12-2009, 02:53 AM	#1
nissan240 Zilvia Junkie Join Date: Aug 2006 Location: socal Posts: 415 Trader Rating: (5)	sr help! most likely boost leak! i was driving home the other night from work and all of a sudden my car started bogging, sputtering. i stopped checked it out for any leaks and seems fine then i drove the car home bogging sputtering the whole way home! this morning i turned my car on i notice my vacumm is at -10psi, if i am correct it should be sitting at -20psi. i checked intercooler piping, i've swapped fuel injectors, fpr, checked all vaccumm lines and still nothing! it just gotten worst this morining so bad that i cant even drive my car. could it be that my bov can cause this massive leak or my boost controller seloniod? or is problem somewhere else?

05-12-2009, 05:43 AM	#2
fliprayzin240sx SLINKY + ESCULATOR = Fun Times Join Date: Aug 2002 Location: Ass Crack of Japan Posts: 8,810 Trader Rating: (8) Rides Gallery: fliprayzin240sx	Pressurize the system...you have a leak somewhere... __________________

05-12-2009, 12:18 PM	#3
nissan240 Zilvia Junkie Join Date: Aug 2006 Location: socal Posts: 415 Trader Rating: (5)	how would i pressurize the system? also could it be my spark plug? ngk iridium heat range 8! my motor is built stage one port and polish on intake side, stage 2 on turbo side, i got camshafts, springs, retainers, guides, pistons rods etc. etc. Last edited by nissan240; 05-12-2009 at 02:20 PM.

05-13-2009, 09:41 AM	#4
fliprayzin240sx SLINKY + ESCULATOR = Fun Times Join Date: Aug 2002 Location: Ass Crack of Japan Posts: 8,810 Trader Rating: (8) Rides Gallery: fliprayzin240sx	If your still running a stock turbo, you dont need 8s. Get some 7s and make sure theyre gapped .028-.030. __________________

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05-13-2009, 02:22 PM	#5
nissan240 Zilvia Junkie Join Date: Aug 2006 Location: socal Posts: 415 Trader Rating: (5)	i have a hks gtrs turbo.

05-13-2009, 06:00 PM	#6
littlegreenmonstor Join Date: May 2009 Location: PITTSBURG, CA Age: 27 Posts: 2 Trader Rating: (0)	have you looked for a vacum leak with starter fluid you spray them intake where the head meets and if you notice it pick up than it's intake manifold leak

05-14-2009, 12:10 PM	#7
teamsprock Premium Member Join Date: Sep 2006 Location: Billings Age: 27 Posts: 422 Trader Rating: (3)	An easy way to pressurize the intercooler piping is go buy a PVC hose end that is the same size as your intercooler, drill a hole in the center and install a valve stem. All of this should cost you a few bucks. Then unhook the turbo and place the PVC hose end in the coupler and tighten the hose clamps. Then add pressure using an air compressor or go to the closest gas station and use the tire station. Then listen for leaks. This will only tell you if you have a boost leak, for vacuum you need to test the intake mani side.

05-15-2009, 02:38 AM	#8
nissan240 Zilvia Junkie Join Date: Aug 2006 Location: socal Posts: 415 Trader Rating: (5)	sweet thanks teamsprock! i will try that this weekend, and will keep you guys updated!!