View Full Version : WHAT is THIS please help.

01-11-2005, 06:44 PM
JDM 185.

I now know what it is.


what does it do. mine has the bottom vacuum pipe snapped off and the green connector is hanging loose.

i know its the turbo VSV, but i need to know what it can cause, i.e. damage, vacuum leaks etc..

Could this have been caused by a duff clutch change as this was done in november by a recovery garage whilst on my hols.

01-11-2005, 08:34 PM

01-11-2005, 10:33 PM
search this forum, i wrote up a decent explanation about the role of the VSV.

01-11-2005, 11:20 PM
Check this site out. Its helped me a great deal:


01-12-2005, 12:59 AM
That VSV is what is responsible for allowing more than 7 PSI of boost ont he stock system. It is a stock bleeder type boost controller. If certain conditions are met, it opens up allowing air to be bled off from the wastegate actuator, thus taking longer for it to open, thus allowing more boost. If the tube coming from the actuator that goes into it is broken or open it will just allow you to boost higher all the time. It also causes a boost leak and a rich condition. If the tube that goes from the VSV to the intake manifold is broken, it will allow you to boost higher when the VSV is engaged, and when the VSV is engaged it will again lead to a rich state. Either way its not good, you should either fix it and reconnect it, or just bypass it completely by just plugging the vacuum hose at the wastegate end, and plugging the hose at the VSV end coming out to the manifold. Thats what youre supposed to do if you install a Electronic Boost Controller anyway.

01-12-2005, 01:19 AM
cheers chaps, all understood now.

01-12-2005, 04:38 AM
looks like a pretty bad case of genital warts to me...


01-12-2005, 04:38 AM
wow..hang on... the pic he posted is of the tvis system not the tvsv (easy to confuse).

it basically gives you more power after 4k rpm. check the archives for a detailed write up of how the system works.

01-12-2005, 07:58 AM
Thats both the TVIS, and the TVSV.

01-12-2005, 11:50 PM
it aint tvis, its the rev 2 3SGTE efi at the back of the block, but anyhow, i'm all sorted chaps, ta for the info.

now for my next trick - watch out