I have an 06 cobalt supercharged , all stock except for eibach pro-kit

About 2 monthes after the springs i noticed when i began to start driving i would hear a rattle as if something was loose.

took it to midas and they weren't able to find anything loose.

Its been about another month since then and its began to get louder and do it more often.

whats weird about this problem is that i can't find anything loose and it only does this up to 30 miles per hour, and when i have my foot on the gas...

lets say shift to second gear at 15 mph , you hear the rattle and just immediatly let off the gas and it stops, put your foot on the gas and boom there it is again.

Its not caused by any bumps or anything , just from 0-30 mph when the foot is on the gas .


( im not accelerating hard , just normal )

Im not sure what exactly is causing this. ANY help would be appreciated !

 

I had that sort of problem in my van and it was the guts of the cat had come loose.
Get under the car and bang on the cat or shake the exhaust to see if the rattle comes from inside the cat.
And if it is it will be warranty.
Another thing is to check those heat sheilds.

 

Could Be Driver Side Axle I Had Same Sound And Mine Just SNAPPED GOOD Luck

 

just installed eibach sportlines myself and im havin the same problem. gonna look at it tommorow and I will post my findings -- btw its not the exhaust I think it might be the design of the rear coils (flexing)