Jack up all 4 wheels, one at a time or all together, it makes no difference, make sure all the wheels spin freely. Check for vacuum leaks, wave an unlit propane torch around the engine to see if the engine speeds up. Make sure your thermostat is working properly, air up your tires. If you use left foot braking, make sure you don’t rest your foot on the pedal. Don’t drive like you are mad at everybody else on the road.
These are all after you check out what ok4450 told you.