The actual removal of the thermostat will not cause this condition but if you possibly disconnected a vacuum hose white changing the thermostat, WOULD cause that problem. Check all of the vacuum hoses to make sure they are connected and tight.
As the vehicle sits idling the driveshaft is not rotating.
It is more than likely a thermostat
Thermostat? or radiator? Greg
Thermostat is stuck open Thermostat is stuck open
Check your thermostat, it is either stuck open or not in the engine.
Type your answer here... possiblity
You probably have a bad thermostat.
Yes it is - only when idling and if I turn the heater on it cools down - thermostat?
Rough idling is whenever the vehicle's motor "misses" or does not fire causing an imbalance and a loss of rotation reducing the motor's power and causing excessive shaking.
Your thermostat is stuck open. Buy a new one they are usually really cheap and you can usually repair it yourself. They are easy to get to even in compact engine space.
I'd check the coolant level first, then the thermostat.
The heating system doesn't get heat until the car warms up and the thermostat opens.