hey everyone
i have an 09 LNF and a few days ago i noticed it was having trouble reaching full boost and
the exhaust would start fluttering. this was progressively getting worse, and now i cant build
up any boost at all, and the exhaust is constantly fluttering, even on idle.
i did notice that the engine itself does not have trouble revving up, and the flutter goes away
on a downshift. this leads me to believe that the problem is somewhere in the turbo system.
maybe my exhaust manifold is loose?
if anyone has any ideas, help would be greatly appreciated.

mods on my car include:
-k&n intake
-zzp intercooler
-zzp catless dp
-mpx catback exhaust

 

Try spark plugs

 

boost leak

https://www.cobaltss.net/forums/08-1...9/#post6120333

check all ur charging connections, check intercooler for damage

 

Thanks guys, it actually was a dead spark plug. The constant misfire was causing the car to go into "limp mode" resulting in no boost buildup.

 

glad u figured it out