Timing at idle bouncing between 2-8 degrees BTDC.

I have a Blue Tooth OBD2 plug in that sends info to a phone app. One meter is timing advance.
My memory is that it used to hang at 5 degrees at idle 800 rpm.

Seems to act normal at highway speeds 20 - 35 degrees BTDC varies with RPM / load as it should.

Changes that might effect this are Exedy LW flywheel, 65mm TB, HFC, 3" exhaust / down pipe. I do feel a slight miss at idle but no change in RPM.

I was wondering if anyone has seen this before?

I will data log with evoscan to see if I am getting some sort of knock signal.

I am concerned that a crank or cam sensor is failing and giving garbage info to the ECU. But there are no codes being thrown.

Any help or suggestions would be appreciated.

Mitsuatb

 

Merlins guide says that Evo 9 actively controls Engine timing to set idle speed 5 degrees +/- 3 degrees.

So that is my answer.

Thanks

Mitsuatb