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post #1 of 7 (permalink) Old 08-04-2011, 09:56 PM Thread Starter
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08 Cobalt LS 2.2 Throttle Body Issues?!

Ok. First off this is my girlfriends car. Its an 08 base model ls with a 2.2 liter ecotec. It has about 80k miles on it. I noticed it seemed low on power so I figured I would change the fuel filter, air flter and change the plugs. Well when I checked the air filter I figured I would look at the throttle body to see how gunked up it was. Sure enough it was gunked up. I also noticed it did not look like it was closed all the way so I tried to push it closed more. Sure enough it moved about a quarter of an inch till it was fully closed. I haent touched it yet due to horror stories about reflashing pcm and stuff cause I'm leaving for a vacation in that car here soon. My question is does it need to be replaced or just cleaned out and relearned where it needs to be for fully closed?? I ve searched everywhere and couldn't find a clear answer on my question. Also the car was off when I notcied that it wasn't closed fully.
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post #2 of 7 (permalink) Old 08-05-2011, 06:24 AM
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Well, I'd remove it from the intake manifold and clean it with some carb/throttle body cleaner. That should work.

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post #3 of 7 (permalink) Old 08-05-2011, 06:51 AM
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Agreed..i had the same issue and did this and worked fine

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post #4 of 7 (permalink) Old 08-08-2011, 06:28 AM
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hope you didnt ruin the electric motor by manually moving the blade. if it idles really high now that would be the cause.
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post #5 of 7 (permalink) Old 10-07-2011, 08:21 AM
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Ok, I have seen a couple postings about this issue...I have had the same issue. I cleaned the throttle body out and ended up with a high idle.

There was another posting where someone had relearned the idle by holding the clutch half out in the manual and forcing the revs down to "normal" range. I tested said theory. Held the revs at about 750 for 2 mins. IT WORKED!!!!! I don't know if this would work in an auto or not, but I can confirm that for the manual this fixed my high idle issue.

Can we sticky this, or combine the high idle/throttle body cleaning posts, make the solutions easier for people to find?

Last edited by apophis05; 10-07-2011 at 08:22 AM. Reason: Adding request for sticky
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post #6 of 7 (permalink) Old 10-07-2011, 11:08 AM
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its not suppose to close all the way.. trust me i just took my 2.2 TB off when i put my 2.4 one on, and my car ran perfect. they are suppose to be open slightly.

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post #7 of 7 (permalink) Old 10-07-2011, 12:29 PM
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Yup, it so that when your car is in idle, you have a little bit of air going into your motor to keep it running. Closing it all the way is asking for trouble.
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