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So I had a bad PCV vale getting lots of codes and running rough.
One of the codes was related to the Intake Manifold Tuning system.

After replacing the valve cover and clearing codes everything seems good and no codes.

But monitoring the Intake Manifold Tuning system with my scantool it appears to be reading as stuck closed (long runners).
I can see the system commanding it to open (turning solenoid ON)at high RPM under load, but the state still says closed.

Attached is the info I found in the manual on cardiag https://cardiagn.com/2010-2016-chevrolet-cruze-service-repair-manual-wiring-diagrams/

This part was odd
The intake manifold tuning solenoid valve solenoid is normally closed
which will not allow vacuum to pass through it. When the engine speed and load are increased above a
calibrated threshold, the ECM provides a ground to the intake manifold tuning solenoid valve, energizing the
intake manifold tuning solenoid valve and allowing a vacuum from the intake manifold tuning valve vacuum
tank to be applied to the intake manifold tuning actuator valve. The intake manifold tuning actuator valve then
opens the intake manifold tuning valve in the intake manifold for desired performance. The variable intake
manifold system consists of the following components:
  • The intake manifold tuning solenoid valve
  • The intake manifold tuning valve vacuum reservoir
  • The intake manifold tuning vacuum actuator
  • The intake manifold tuning valve
  • An intake manifold
See attached excerpts.

Here's a video I took which shows the system is able to move the valve.

Around 24 seconds in you can see it move, this was right after a cold start. It just doesn't seem to be detecting it.
However I didn't have the tool attached nor able to monitor while taking video.

So does any one have a tool and know what PID in need from the data to verify the ECU sees in open and close?
 
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