A couple reasons. First the air fuel mixture is different because of emissions regulations, and second, metal expands when it gets hot and is slightly less efficient. If you are referring to why does the car run quicker when it is cold outside, that is due to the density of the air. Cooler air is denser, therefore can compress easier and basically has a faster decompression when ignited. Its not just the 2.3L, its all engines. Check this website out: www.howstuffworks.com.
Wow. 1. When your car is cold it needs to warm up, so it idles faster. 2. This is easier to do cause all your oil is at the bottom, it hasn't circulated yet, and it's thinner until it warms up. Your engine is supposed to idle fast when it's cold.
he didn't mean idling fast it was about the engine being quicker... and it is, rhagel has it right, i also believe there is a different fuel map until the engine has "warmed" up and that map does seem to give it a quicker feel regardless of the temp outside...
Wow. 1. When your car is cold it needs to warm up, so it idles faster. 2. This is easier to do cause all your oil is at the bottom, it hasn't circulated yet, and it's thinner until it warms up. Your engine is supposed to idle fast when it's cold.
The reason why the engine idles faster when it is cold is due to emissions. You catalitic converter and other emissions equipment actually works better when it is warm. By idling faster, it changes the air/fuel ratio so it lowers the emissions. Your oil is actually thinner when it gets warmer, but it ciculates faster also, that is why it is more efficient when it is warm.
