Chichalundo

I have a mk 3 Octavia RS upto date with its services (160 000 kms). It’s just started having a low idle issue on cold starts. The revs drop too low and it stalls. After even a minute of driving it’s fine. I’ve also noticed that the analogue temp gauge shows that it’s pretty much at temperature on a cold start (~80 degrees) but the digital oil temperature gauge seems to be working correctly. Could this be a thermostat issue? I’m guessing that the ecu thinks the engine is hotter than it is and isn’t delivering a rich air fuel mixture as it should for a cold start.

Is there anyway I could move the immobiliser from the old cluster to the new one?

The screen of my cluster on my 2015 Octavia rs was playing up. So I bought a second hand replacement. When I installed it gave me a warning and wouldn’t start. When I changed it back to the old cluster it gave me all the warning lights, airbags, sensors etc. but it did start and drive. The annoying thing is the screen is working fine now so the connector was probably loose. Is there a way to reset it so everything works again?