Hi guys, can anyone help, I recently brought a mk5 and when I brought it the thermostat was stuck open so the engine was running a cold temp. About 50-60.
I drove it like this for a week and the car felt really quick being my first GTI.
I've just got it back from the garage after having a new thermostat put on. It's running a perfect temp at 90 but feels way down on power now from when I dropped it off.
Would an open thermostat make it run quicker?
And this is infact how the car should be. Or could something be wrong?