My 92 Si idle's significantly lower than usual when it's hot outside. Sometimes when coming to a stop the car looks like it wants to die, but the rpms gradually increase back up to 300-400 rpm after a few seconds of idling in neutral. Even then, you can tell the car's idle is a little rough and lower than usual.

I read that a dirty IACV could cause an erratic idle and a sticking/dirty FITV could cause an abnormally high or low idle when the engine is warming up. My car doesn't really have either of these issues. Is there some other valve or temperature sensor that controls the idle speed and may be effected by outside tempature?

Any help with figuring out the low idle issue would be appreciated. Thanks!

 

up

 

The fast idle is most likely set too low from what it sounds like to me.

 

Why would the the FITV being set too low affect the idle at normal operating temps? Doesn't the FITV only affect the idle speed when the engine is warming up? Also, is it normal for cars to idle at different RPMs depending on what the outside temperature is?

 

bump, i'm having the same problems, and today(when it was hot outside) the car died, and i couldnt starte it until about 15mins later

 

I had this same problem today sitting at a stop light in neutral. It feels as if the car is going to choke up and die...


but i'm not sure what it is.

 

anyone?