ok for starters when i drive my ss/sc sometimes when i shift from first to second my cars throttle drops off and then comes back meaning when i hit the gas theres nothing there then all of a sudden its there?

second problem put stage 2 on and got a po172 code running rich didnt get this code until i had gm retune and i already put a 3.10 pulley on this prior so i dont think the sc is leaking at gasket. i put it on a wide band and at cruising no boost a/f is 14.7 now if i floor to 7000 rpm it reads 10.9 but the light came on at a cruising rpm any ideas on either problem thanks

 

you are burning your clutch.

https://www.cobaltss.net/forums/show...h+driver+input
watch this before you roast it off completely.


do you have an intake?
often the cold weather, combined with an aftermarket intake will cause that code.
its really not a huge deal.

 

im not burning the clutch
plus forgot to mention my car stinks like rotten eggs out the exhaust alot?

i do have a cai

 

rotton eggs probably means your cat is fuxxord

your CAI is causing the code.

 

I don't think hes slipping the clutch. I think the supercharger just isn't reacting all that fast for some reason? Stick bypass valve or something?

 

has there been any problems with the throttle seeing there not cable run

 

There has been a few, but they usually set codes and act up more at startup. There is a thread somewhere about how timing is affected by a real harsh 1 -2 upshift, not to mention any exhaust restriction (like said cat issue) could cause a similiar concern.

 

take it to the dealer, its almost certainly your cat causing both issues.

 

should i go with a factory replacement cat and down pipe assembly or buy an aftermarket hi flow cat and down pipe or will i get different codes going with hi flow in ny my car wont pass state inspection

i guess im going to try the cat converter will this one from ced work good with out any problems ill get my extended warrenty to pay for it
Random Tech Down Pipe 141-27010
Item #141-27010
141-27010 Random Technology Super High Flow Catalytic Converter/Down Pipe.
05-07 Chevrolet Cobalt SS 2.0L SC 05-07 Saturn Ion Redline 2.0L SCL SC
Will fit both GM exhaust manifold and GM exhaust systems.
MSRP: $440.06 Your Price: $410.38

 

www.zzperformance.com
www.cobalt-addiction.com

check those sites for downpipes before you do...

 

ya im with anOmolous the rotten egg smell a good indicator..just go to dealer and get another cat and then slap a stage 3 pully on there or a 2.9

 

ive got a 2.8 on there now id hate to put a factory cat back on if they are a problem

 

www.customtubesinc.com as well

 

ill look into it