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Old 10-13-2014, 05:06 PM   #1
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Help! Can't Diagnose Smoke Problem!

Hello everyone, first time poster on this forum. I recently got a 2011 GT with 30,000 miles. The car has a lethal GT tune, Steeda CAI with airbox, 3.73 gears, and axle-back Corsa Extreme exhaust. I have been noticing a very small amount of smoke coming from the back end of the car. It only happens when sitting at a light or something after running up to high rpms and lasts for a few seconds then stops and it might do this one or two lights in a row then nothing. It does not smoke under normal driving conditions, doesn't smoke when started, and no smoke under hard acceleration literally only when stopped at a light afterwards. It is also always on one side or the other and looks like its coming from more so around the tire/quarter panel area instead of the exhaust. Its hard to tell what the color is because it is so light sometimes its even hard to notice but it looks grayish and has a strong exhaust smell. The car does run rich with the tune but it runs great. Also I noticed it is consuming a small amount of oil in between changes but from what I hear that's normal for the 5.0's. Any information would be really appreciated!
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Old 10-13-2014, 05:40 PM   #2
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Do you have a o/r x pipe? Sounds like you do.

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Old 10-13-2014, 05:54 PM   #3
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Yeah it has an x-pipe I'm not sure what kind though.
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Old 10-13-2014, 06:08 PM   #4
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That's what it is. It's exhaust fumes destroying the ozone from your o/r x.

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Old 10-13-2014, 06:39 PM   #5
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How do you know it's running rich?
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Old 10-13-2014, 06:54 PM   #6
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From what I have heard its common for email tunes to run slightly rich and there is a light build up of soot on the exhaust.
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Old 10-13-2014, 06:55 PM   #7
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Do you have cats?
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Old 10-13-2014, 07:00 PM   #8
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It does have cats.
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Old 10-14-2014, 11:45 PM   #9
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What color is the smoke?


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Old 10-15-2014, 01:57 AM   #10
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Its hard to tell its very thin but its more of a gray color.
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Old 10-15-2014, 02:05 AM   #11
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Could be water,does it go away? Worse in the morning?

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Old 10-15-2014, 02:20 AM   #12
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It only happens sometimes after going over like 5k rpms and it lasts for a few seconds while stopped then goes away and wont do it again until after getting on it again.
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Old 10-16-2014, 12:16 PM   #13
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It the warm exhaust gasses meeting the cooler air. Nothing to worry about
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