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Engine revs at red lights

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Old 04-17-2007, 11:03 PM
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Engine revs at red lights

Hi,

I have a problem where the engine revs on its own when I am stopped at a light. My foot is on the brake and the gear in neutral. Any ideas of the problem?
Old 04-17-2007, 11:08 PM
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Sure your foot isnt barely touching the gas? Happens to me sometime. How high does it rev too?
Old 04-17-2007, 11:08 PM
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Originally Posted by blk_mjik
Hi,

I have a problem where the engine revs on its own when I am stopped at a light. My foot is on the brake and the gear in neutral. Any ideas of the problem?
Take it to the dealrship.Have it reflashed. I had the same problem.They said there was new updates for it.
Old 04-17-2007, 11:28 PM
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Originally Posted by HickOverLOrd
Sure your foot isnt barely touching the gas? Happens to me sometime. How high does it rev too?
yup, very sure...i mashed on the brakes just to make sure.

it onlys revs up to about 1500 rpms then comes back down to 1000.

will do

thanks

Last edited by blk_mjik; 04-17-2007 at 11:28 PM. Reason: Automerged Doublepost
Old 04-17-2007, 11:32 PM
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happens to me to. usally happens after i dog it or i rev it real high, usally goes to about 1500 then back down tehn to 1000 and thats it. but i have no idea why
Old 04-17-2007, 11:35 PM
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i think it does that on every cobalt... i ve seen it in a bunch of cobalt vids

mine does it 2

Last edited by CobaltVenomSS; 04-17-2007 at 11:35 PM. Reason: Automerged Doublepost
Old 04-17-2007, 11:39 PM
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check your floor mat...
Old 04-18-2007, 11:13 AM
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cool, thanks for the suggestions.
Old 04-18-2007, 11:22 AM
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i think thats normal
every cobalt ive seen does that before settling down to idle.
Old 06-28-2007, 07:20 PM
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Originally Posted by Gixxerboy02
Take it to the dealrship.Have it reflashed. I had the same problem.They said there was new updates for it.
Did anyone else try to have it reflashed. i have the G5 with the same problem. or anyother solutions. i tried unplugging the battery and it fixed it for a month but it came back
Old 06-29-2007, 09:12 AM
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i have the same thing to except it has happened after i put my CAI on but usually when i put the A/C or defogger on

anyone know what this could be?
Old 06-29-2007, 09:15 AM
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mine does it jumps up 1500 then down almost to where it seems its gonna stall. I dont know why but its probally becuase of the tune from gm
Old 06-29-2007, 09:54 AM
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It's a faulty ECM flash. Take it to the dealership, reflashed for free
Old 06-30-2007, 02:54 PM
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You could also check for air leaks around the CAI, that can cause the car to rev slightly
Old 06-30-2007, 03:21 PM
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Its your car trying to get you to race the guy in the other lane.
Old 06-30-2007, 03:23 PM
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I was told from a tech that it is normal. It's the Supercharger sucking in air so it makes the rpms go up a little. I like it. Makes it sound like its breathing. hehe
Old 06-30-2007, 03:23 PM
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My idle only surges up and down when I have the A/C on... But I NEVER have the A/C on... so I don't worry about it.
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