alright so my car is really quiet.
more quiet then stock
no power at all
stumbles all the time
getting 25 mpg
after about 3000 rpms it falls on its face
it idles perfect.
no skips

clogged cat?

my mods are
injen intake
gm stage 2
vibrant 3" catback

 

Quite possibly a clogged cat

 

if not what else could it be?

 

Stumbling and no power over 3K could be moisture or oil on your MAF. I've had that before. But because of the other symptoms I would say clogged cat as well. Is your boost reading higher? (If you can get a reading because of the low rpms)

 

i dont dare crank it over 3k it sounds like its going to come apart. but at 3k im at 12.5 psi

bump

 

GM stage 2 tune? Probably a clogged cat, could be a MAF as well but I would lean toward the clogged cat.

 

k thanks guys