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GS - 2nd Gen (1998-2005) Discussion about the second generation GS300, GS400 and GS430 (1998 - 2005)

Need some help please

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Old May 30, 2022 | 06:04 PM
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Steve93sc4's Avatar
Steve93sc4
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Default Need some help please

Long story short, got an 04 gs300 with a 1jzgte vvti swap. Aftermarket headers, turbo, wastegate, bov. All piping is on..turbos good. I cannot for the life of me, get my boost gauge to measure any boost. The car runs and drives. I can push the throttle all the way down...and the needle on the boost guage jumps, but doesnt go past 0.

I have a vacuum block hooked up to the intake mani, and the boost gauge is hooked to the vacuum block...as well as the BOV. Also the bov doesnt even work (im assuming cause no boost?). Ive done boost leak testing, it holds up to around 8 psi then my cheap WG starts bubbling.

Ill get pics tmw...but im completely lost on why i have no boost.
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Old Jun 1, 2022 | 09:13 AM
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Have you tested the gauge and vacuum block with shop air to make sure it is freely flowing?
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