does anyone else have black smoke comeing out there muffler when you hit the gas? also a odd smell? my G5 is good for doing it my tip is all black and i cant keep it clean lol.

 

Bad Cat? Sounds like your running really rich and it's not burning everything off.

 

at first me and my dad thought it was because it sat all winter. but i have been driveing it for about a month and a half now and i have filled it with 93 gas 2 times now. the car has the gmpp intake and cat back is that has anything to do with it.

 

You have a problem...take it to the dealer and have them check it.

 

Rock 93 gas everytime also.

 

i messed up a month or so back and mixed the gas with 93 87 and 91. but i filled up 2 times after that with full 93. i took it in today and they said everything is fine the motors just cleaning itself out. from siting all winter to driveing 8 miles all back road to work. thats why when i get onto the highway and open it up i get the smell they said. it does sound right to me. ill keep a eye on it and see how it does. i started takeing the highway home from work now but its not much only 1 exit up.

 

That's information that should have been in your first post...

 

Hit it with some seafoam.

 

haha i thought it was in there lol. yea so thats why he said it was doing that. i took it on a 200 mile trip last weekend so im guessing most the crap should be almost out of the motor. im about to need gas tomorrow ill fill it with 93 again.


how does the seafoam work?

 

91/93 doesnt matter with these cars.

The tune will treat 91/93 as the same (91).

With that said, black smoke out the exhaust while motor still feels good, is you are running richer than hell.

 

wierd, my car doesnt puff black smoke but the tips are really dirty...

 

HOly ****, king isn't banned any more.

 

x2 anybody? I hear its good from some and bad from other people. by what means and how good of a job does it do?.....and is it safe

 

https://www.cobaltss.net/forums/how-guide-43/how-seafoam-ss-sc-111878/
There's already a how-to. I know lots of guys that swear by the stuff, and it's particularly good for cleaning out the gunk from a motor that been sitting.