Whether RPM will be higher with a cold engine in the morning?

Question:


Answers:

Dash light problem in '97 Nissan Altima?

Car engines will idle faster on a cold start due to a higher compression ratio (which is another reason why people have been telling u all ur life to let the car warm up before driving away. It not only reduces stress on engine parts that have temporarily become more brittle due to usually bitter outside temperatures, but also saves gas). its perfectly normal, as long as its not rediculously high like anymore than 3000rpm while warming up. once it has been brought up to temperature(when the temp needle is halfway between the Cold(C) and the Hot(H)), idle should no longer be that high as the compression ratio is reduced and a leaner mixture is provided. Ideal ranges for normal operational idle rpm's are anywhere between 700-1100, depending on the car. some actually may be higher or lower, but that is very unlikely. hope that eases ur worries.

how long does it take to change a cylinder head gasket on a BMW 535i?

Yes. It should come down gradually as it warms up. Unless you have a carburetor, than God help you.

Car Stalling issues? Long description...?

yes while the engine is cold it will have a higher RPM then after a while it should go back down to normal.

What options do I have for increasing the mpg of a 96 Nissan Hardbody Std XE 4cy 2.4l pickup truck?

If your engine is functioning correctly yes, your engine should idle faster when it is cold.

Side Mirror Replacement Question...?

RPM is higher when the automatic choke is on (when the car is cold)

change 220 volts ac to 415 volts ac though a inverter?

When you start a car when it's cold outside, the engine idles faster for the purpose of getting the engine to operating temperature faster.
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