2017 Legacy 3.6R Limited Stalling/Rough Idle Please Help

[MarkSemenyuk]

Ive been having trouble with my legacy (75,000 miles) for quite some while and I want some input and help to possibly help sort this out. My car for about a year now has been idling rough once it gets warm and it stalls out when either shifting into gear or simply staying stationary. The RPMs go up and down and stall. Sometimes its worse, sometimes its better. Ive replaced all spark plugs. Regularly change oil. Checked all sensors. Just check for vacuum leaks. Did a full body scan (No Codes Ever). Cleaned and checked EGR Valve. Throttle body is clean and perfect. Alternator is perfectly fine and battery is brand new.

And nothing I check or do seems to help. I am going to replace my transmission fluid to see if it helps (CVT Trans). I have a slight thought that it could be possible the torque converter is failing, but the car can stall even while it is in park which makes me doubt it a little bit. Any input or thoughts will be greatly appreciated because the car is a headache to drive sometimes. It only acts rough while either in idle or while slowly creeping (idle creep).

Thanks!

 

[Ecmbuster]

Explain : "Did a full body scan (No Codes Ever). "

If these is a misfire, try one of these applications running on Android

My Tribeca 3.6L with no misfires and no faults.
If there is a misfire at idle, it can be seen.
If there is a misfire under load or road conditions, it can be seen but screen recording must be used and saved.

Torque Converter

CVT Common Operating Characteristics - Subaru Canada

www.subaru.ca

OBDLink App

The OBDLink® proprietary app offers enhanced diagnostic data and features so you can do more for your vehicle. Learn more here!

www.obdlink.com

Mode 6 images in black

Torque Pro (OBD 2 & Car) - Apps on Google Play

Measure BHP, Torque & 0-60 Clear car OBD faults View engine data in Google Earth

play.google.com

Mode 6 images in green

One device, running multiple applications via Bluetooth (OBDLink MX +)

During this test - Counts are 0 meaning no misfires and will eliminate cylinder misfires.

 

[MarkSemenyuk]

Explain : "Did a full body scan (No Codes Ever). "

If these is a misfire, try one of these applications running on Android

My Tribeca 3.6L with no misfires and no faults.
If there is a misfire at idle, it can be seen.
If there is a misfire under load or road conditions, it can be seen but screen recording must be used and saved.

Torque Converter

CVT Common Operating Characteristics - Subaru Canada

www.subaru.ca

OBDLink App

The OBDLink® proprietary app offers enhanced diagnostic data and features so you can do more for your vehicle. Learn more here!

www.obdlink.com

Mode 6 images in black

Torque Pro (OBD 2 & Car) - Apps on Google Play

Measure BHP, Torque & 0-60 Clear car OBD faults View engine data in Google Earth

play.google.com

Mode 6 images in green

One device, running multiple applications via Bluetooth (OBDLink MX +)

During this test - Counts are 0 meaning no misfires and will eliminate cylinder misfires.

I took it to my electric guy and he scanned the entire car with his computer and nothing came up. The car is not misfiring I have tested it time and time again hoping that would be the case but it just isn’t. Just had transmission inspected and fluids replaced and torque converter is completely fine.
Any other suggestions?

 

[Ecmbuster]

This tool with the applications mentioned. Then screen recording (video) software running on an Android.
Then if there is a misfire (rough running) at idle or load, it can be seen and captured.

This tool should also work with your model.
ActiveOBD Application Android

ActiveOBD - Apps on Google Play

Multi function display app for Subaru vehicle MY 2012+ (not official)

play.google.com

Bluetooth OBDLink MX +

Did anyone check / test volumetric efficiency? Test for internal vacuum leak measured at the dip stick (should be very low).

VE Calculator - Apps on Google Play

Volumetric Efficiency Calculator for vehicle driveability. From ATG Training.

play.google.com

This image was captured but had a fault and poor fuel economy. Top values should be following each other.