I have my Si tuned to the 6psi (Sport Button) and NLF/FTS and never had any problems, mods are PRL stage 1 intake and thats about it for the engine.
The other day I added rev hang delete/disable and after a few hours I got a bunch of dash lights (brake system, VSA, ESP, CEL). I disconnected the battery and sometimes it goes away and other times it does not, other times it goes away on its own, the last 2 times the lights came on when I was just cruising on the highway, 6th gear, not boosting or anything. I have the Overrun Fuel Cut Delay values set at 50ms (1st gear), 40ms (2nd gear), 30ms (3rd gear) and 20ms (4/5 gear). These were suggested.
Any ideas? I might just enable rev hang again.
2018 Si Rev Hang disable
Re: 2018 Si Rev Hang disable
You need to datalog and check to see what error codes you are getting.