Hi Guys, been a while.
I've got a R53 JCW. Car sat for a few years. got it back and going last week. New battery installed.

Strange problem with the tach and warning lights., but other than that, car drives great.

CEL light comes on randomly, but thats nothing new, as what I have experienced, sometimes when coming off the throttle, at high altitude, car throws a lean code. No big deal, was doing that before.

So now, in no order of importance: When driving (drove 300 miles this weekend to Aspen)

when idling, Tach goes to zero, but comes back to proper RPM after a few. Stays backlit

When driving, tach does as above

When driving, tach hoes dark, no backlight, and at zero.

When driving, TPS spedo and/or DSC light comes on.

Thoughts of where to start troubleshooting?

TIA