Idles Weird - Chevy Cobalt Forum / Cobalt Reviews / Cobalt SS / Cobalt Parts
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post #1 of 8 (permalink) Old 04-10-2013, 11:33 AM Thread Starter
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Idles Weird

when my 06 cobalt Lt. is at idle it doesn't sound right. and twice the car randomly shut off. luckily i was home when it happened. its idling around 800rpm, i think thats a little low shouldn't it be around 1k rpm. the only mods i have is a catback exhaust and air box mod. i don't think its the exhaust, but it could be.

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post #2 of 8 (permalink) Old 04-10-2013, 12:08 PM
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That sounds about right. My idle on my SS was 750, and my idle w/ no AC on my evo is 700, with AC on tho it's 950 and same with my SS.

800 is a good idle. If it is just randomly dying, is it giving any CEL's?

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post #3 of 8 (permalink) Old 04-10-2013, 12:11 PM
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Nominal idle speed is set 750rpm. You my friend are describing all the symptoms of a dirty throttle body. When is the last time you cleaned it?

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post #4 of 8 (permalink) Old 04-10-2013, 02:11 PM Thread Starter
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when i got the it wasn't running right at all so the dealership supposedly cleaned everything. but i got the car when i t had 30k ish miles now its got 40k miles. ill take a look and see if its the throttle body. and its not giving me any codes and the check engine light isn't on.
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post #5 of 8 (permalink) Old 04-10-2013, 02:44 PM
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Dirty throttle body never gives out a code.

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post #6 of 8 (permalink) Old 04-10-2013, 02:54 PM Thread Starter
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ill look at it when i get home and let you guys know.

2006 Chevy Cobalt RS
Mods: Catback Exhaust, SRI.

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post #7 of 8 (permalink) Old 04-10-2013, 02:58 PM
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It will look like a tary substance all the way around the butterfly.

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post #8 of 8 (permalink) Old 04-10-2013, 08:21 PM Thread Starter
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it had a good amount of gunk on it. ill see if it helps being cleaned.

2006 Chevy Cobalt RS
Mods: Catback Exhaust, SRI.

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