2.2L LAP Performance Tech 2.2L LAP Performance Tech (2009+) 155 hp EcoTec with 150 lb-ft of torque

Vacuum Leak? SeaFoam Smoke Under Hood

Old 03-09-2014, 09:23 PM
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Vacuum Leak? SeaFoam Smoke Under Hood

Hey guys, I have used seafoam plenty of times and I am very familiar with the smoke.....
that comes out the TAIL PIPE!!!!....

TODAY I had smoke coming from under my hood blowing thru the vents it was even in my trunk lol (from the blower inside the car being on)

basically....wtF? I googled it and a few other types of cars and their forums called this "Normal" citing various vents ports etc for the excess smoke to escape but

this has never happened on my cobalt - is this in fact normal? Vacuum Leak? Worse?
222000+ miles

Last edited by Robert Brandon Burns; 03-09-2014 at 10:13 PM.
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Old 03-09-2014, 09:29 PM
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btw the car drives just fine if I hadn't seen all that smoke I wouldn't have even thought twice about it...
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Old 03-11-2014, 02:20 PM
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Thanks for all the great help so far LOL

Just in case this ever helps someone else, I THINK there is an exhaust leak. I've noticed a strange noise when driving it, & I noticed that the Triangle shaped flanges are misaligned so maybe somethings leaking out

Taking it to an exhaust shop thursday
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Old 03-25-2014, 10:08 AM
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yea those stock flex pipes blow. common
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