In the search for finding out why my car is weak over 3,500 rpm, I've recently had a brand new water temperature sensor fitted, and my gauge shows me that every so often the car falls below 90 degrees (round about 80-85 I'd say).
Is this normal?
Every other car I've owned has stayed at 90 degrees once it's there. Never owned a car that falls below and then goes back up to temperature randomly?
The new sensor isn't faulty because there are no error codes from diagnostic checks.
Wondering if this is just a normal thing that 1.8T's do?