i havn't looked in the manual or on the car to see if there's a suggested idle rpm, mine idles at 1 grand which should be stock like everyone elses, i was wondering, since i owned a bike previously if lowering the idle to around 5-600 rpm to save gas while waiting at lights and stuck in traffic is do-able. any reasons not to? how would i do this? i havn't experimented so not sure if the engine would bogg or have trouble starting up, seem slike an easy way to cut your gas usage while idlling almost in half, because i heard that an idling car can burn 1 gallon per hour which is easy when you calculate the all the minute you sit at traffic lights. any comments welcome. its just an idea, has anyone done this.

 

you shouldn't be idling at 1000...

 

yea you should be in the 550-700 range

 

yea i just checked it and it idles around 700, but i swear it was at 1000 yesterday when i glanced a it... oh well

 

cold starts the engine runs 1k just as a warm up. i'vbe noticed this a lot nothing to worry about.

 

x2 on cold starts, but nomrla idls not at 1k, its right in the middle of 500 and 1000, something like 700-800...i plugged in a ob2 scanner once and it showd my idle from 700-800

 

I Idol at 600 when no ac on and hot start, cold start 900 and hot with ac is right around 700.

 

My Aeroforce Interceptor shows 750 Rpm's at Idle

 

x2

The idle in the winter is much higher. I remember seeing the idle as high as 1200 RPM on cold starts in the winter.

 

^^^i've seen that too.

 

the car must've ben cold when i saw t idlingn at 1 grand, nothing to worry about since it drops to around 6-750 when warm.

another concern is y coolant temp, it was at 208* yesterday... is that normal?? it's usually right at 190* but i was running it pretty hard, i hope its not my air filter beacuse i has a modded stock box wih cone fiter

is this something to worry about?

 

Coolant temp between 180-220 is ok. I see 210 sometimes if I'm in traffic.

 

You can do it in hp tuners...but it may make your car stall at idle. Probably should be okay; trial and error ftw.

 

hptuners doesn't work on 2.2 cobalts

reading>you

 

The idle is based on the coolant temps. When the coolant temp is under 120 degrees the car idles higher. Once it gets above 120 the idle goes into the normal range. The idle is probably different based on whether you drive an auto or manual. Auto idle should be somewhere are 700 or 750 and manual idle is usually a bit higher around 800 or 850.

 

Nope, my 5-speed idles at 750 usually.

 

cool, thanks i hav't checked with my new exhaust, i wonder if that changes anything