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

btw the car drives just fine if I hadn't seen all that smoke I wouldn't have even thought twice about it...

Thanks for all the great help so far LOL :r:

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 :redx:

Taking it to an exhaust shop thursday

yea those stock flex pipes blow. common