Check your RPM speed when is Hot and see if is above 280-300.
Turn ignition On, get VCDS , go to 01-Engine , find RPM in MBV and start craning and look . You can do log as well to record exactly how much was RPM.
Be aware that most of those guys, specially once on Ebay , have no idea what they doing and if they mess up your original cluster data , then you will be upside down big time. They all said Yes we can do it ,You have to understand most of those stores looking for Number to hit, they do not care...
In First scan There is no communication with Engine computer ECU . You need to check and make sure you getting all 12V and grounds to it before you get other ECU .
It is possible that ECU is bad , but need to be 100% sure not just guess.