aperson

Mine does this every so often, I ended up taking the throttle body off and cleaning it.

I also used BTSSM and my Tactrix 2.0 cable to reset the ECU and allowed it to idle for 10-15 minutes to re-learn the idle and it seems to have gotten better.

The only issue I still have is harsh downshifts to first under deceleration.

You can still remove the LED light I've done on other car's before with engine swaps with clusters and as far as knowing if a issue pops up I have a Android radio that has torque on it and can use that to monitor any engine codes

 

Sent from my Pixel using Tapatalk

Depending on where you are the MIL light working properly may be part of your state inspection. I know it is in NY but it all depends on who you know.