RB25DET VTC Not Advancing – Solenoid Clicks, No Cam Angle Change (ECU Master)

Hey everyone,

I’m troubleshooting the VTC system on my RB25DET Series 2 (ECU Master EMU Black), and I’m stuck. The VTC solenoid activates, but the cam angle doesn’t move in ECU Master. I’ve done a lot of testing, and I’m wondering if my VTC gear (intake cam gear) is stuck or clogged.

🔹 What I've Tested So Far

✅ Oil Pressure is Strong → 38 PSI at idle, 100+ PSI at high RPM✅ VTC Solenoid Clicks When Activated → Confirmed via ECU output test & manual 12V power✅ Manually Applied 12V to VTC While Engine Was Running → Engine tone changed slightly, but no cam movement✅ Checked Oil Flow at VTC Solenoid Hole → Oil is reaching the solenoid, so the passage is open✅ Revved to 3,000+ RPM While Activating VTC → Still no cam angle change✅ ECU Reads Cam Angle Correctly After Adjusting Offset to 723°✅ CAS Timing Verified & Trigger Angle Set Correctly (Locked at 15°, verified with timing light)

🔹 What’s Still Not Working?

The ECU commands VTC, but Cam Angle Actual never changes in Live Data.Manually powering the solenoid at idle makes a slight noise change, but the cam doesn’t advance.Even at high RPM (3,000+), the cam still doesn’t move.Solenoid clicks, oil is flowing, but no timing movement.

🔹 My Best Guess – VTC Gear is Sticking or Clogged?

Since the solenoid works and oil is reaching the gear, I suspect the VTC gear (intake cam gear) is stuck, clogged with sludge, or internally worn out.

I’m planning to remove the VTC gear and inspect it, but before I do:

1️⃣ Does this sound like a classic stuck VTC gear issue?2️⃣ Has anyone seen an RB25DET VTC fail this way?3️⃣ Before pulling the gear, is there anything else I should check?

Any advice is appreciated! Thanks in advance!

🔹 Additional Info & Setup:

Engine: RB25DET Series 2 e85ECU: ECU Master EMU BlackVTC Output: AUX 2, 33 Hz (Tried 200 Hz as well)Oil Pressure: 38 PSI at idle, 100+ PSI at high RPMCAS Timing Verified (Trigger Offset 723°, Ignition Timing Locked to 10° & Verified with Timing Light)VTC Activation RPM: ~1,500-5,500 RPM