High (steady) idle after spirited drive
I noticed that my car idles higher than normal everytime I play a little bit with it. Lets say I push it for 10-15 miles with long sections over 5k rpm, when I come to a stop, the car idles fine and steady, but at 850rpm. Usually, when granpa driving, it idles around 600rpm. After a while, the idle returns to its usual 600rpm.
I can come with no idea of a condition that causes different idle according to previous use of the engine.
I've read codes with INPA and found no stored fault.