1JZ VVTi Turbo Vacuum Lines - Broken VSV Replacement

Enginebeginner✓ OP Confirmed

Problem

On a 1JZ VVTi swap, the VSV (Vacuum Switching Valve) that connects vacuum lines 1, 2, and 3 on the turbo side was broken/snapped during engine shipping, leaving the factory blow-off valve vacuum circuit incomplete.

Broken or snapped VSV connecting turbo-side vacuum lines 1, 2, and 3BOV vacuum circuit not functioning properlyUncertainty about whether lines can simply be tee'd together

Root Cause

The factory VSV (Vacuum Switching Valve) that routes vacuum to the blow-off valve and associated turbo-side vacuum lines was physically damaged (bent/snapped) during engine shipping, breaking the vacuum circuit.

Confidence

Low confidence — Original poster confirmed this resolved the issue

View Original Thread →Posted September 2021 on SupraForums.com