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I have an 09 Cobalt 2.2 lt. While I'm driving 30-40 mph, the cars revs itself. its tuned up minus the fuel filter.
 

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Yeah its an automatic.

---------- Post added at 10:20 PM ---------- Previous post was at 10:19 PM ----------

The rpms bounce. no downshift that im aware of.
 

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i have an 07 Ls manual with the 2.2 and the other day I started mine and it revved itself up a few times for a time frame of about 10 seconds between 1 to 1.5k rpms but after that it was fine and drove fine with no other rpm problems, it has happened 1 other time after that the same day but it hasn't since
 

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i have an 07 Ls manual with the 2.2 and the other day I started mine and it revved itself up a few times for a time frame of about 10 seconds between 1 to 1.5k rpms but after that it was fine and drove fine with no other rpm problems, it has happened 1 other time after that the same day but it hasn't since
Mine does it all the time. Its annoying especially driving in the city.
 

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I had that problem with mine. Also, it would die when I was turning or even at an idle sometimes. I cleaned the throtle body really good and it hasn't done it since.
 

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Clean your MAF sensor, also clean your TB.
both take a couple of minutes...
 

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mine does this as well at slower speeds i wonder what it could be every day on my way to work because i go through two 30 mph zones a 15 mph school zone and a 35 mph zone, and i have no idea what it could be.
 
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