VVTi Solenoid Issues (Later Models)
Symptoms
Rough idle, loss of mid-range torque, check engine light. Fault codes related to Variable Valve Timing.
Cause
The later 2JZ-GE engines (1997+) feature Toyota's VVTi system. The VVTi oil control valve (solenoid) can clog with oil sludge, preventing proper cam timing adjustment.
Fix
Remove and clean the VVTi solenoid with carburettor cleaner.
If cleaning doesn't resolve the issue, replace the solenoid ($100-200).
Regular oil changes with quality oil prevent this issue.
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