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I started my car last night, not too cold out and my rpm jumped to 2300rpm and held there until I shut it off. My idle usually sits at a solid 900-1000rpm. The only thing that makes sense to me is that I have a vacuum leak somewhere from the intake..any suggestions?
 

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Did you try revving it a few times to bring it down? Whenever I start my '06 it'll idle at about 1600 rpms when it's real cold out until I rev it once or twice and it drops down to normal.
 

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Check for vac leaks, get a length of vac tubing and stick it in your ear, when I found mine it litteraly pulled it on to the leak and sealed in my ear lol. Also check your timing.
 
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