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Engine idles high for too long in morning

5.1K views 23 replies 22 participants last post by  nayilsi  
#1 ·
I own a 08 black si coupe, stock, and for some reason, whenever i turn on my engine in the morning or after like 5 hours of not driving it, my engine idles around 1.6-1.8k

my friends told me it was a lemon and i should bring it into dealer, but after about 3 to 4 minutes it idles down to normalish of 800-1200

i live in southern cali by the way, so it has nothing to do with freezing temperatures, nor do i run my engine hard. i drive quite moderately

anyone else with the 08 si experiencing this?

hope its not a problem, just being cautious
 
#11 ·
Exactly. Cold means not operating temperature. The OP mentioned that he was in California and not very cold. However, 70 degrees is very different than a normal operating temp of 200 degrees. The car will idle high for a while even at mild ambiant temps, though it may idle high longer at lower temps (takes longer to get to operating temp).
 
#6 ·
Yea, like these guys said...its completely normal. Dont let people constantly worry you about something being wrong with your car. It will only make you paranoid and you will not be as happy with your car in the long run. These cars, while having minor annoyances like 3rd gear from time to time are pretty much bulletproof. Just get in, let it idle for 30-45 seconds and take it easy until the car is warmed up.
 
#20 ·
that is normal. i wouldn't worry about it... but the car is on warantee so if it makes you feel more comfortable... take it in to get looked at.

when you start the car is should be around the 2000 mark. (thus is called fast idle) the civic has two fast idle stages. the first is approx 2000.... then it goes down to approx 1500 and then down to the normal of 500-800.

fast idle on a cold car is completely normal! i was told that the fast idle also allows your car to build oil pressure which is why you should let it run for at least a min before driving off no matter how cold or warm it is out.