My brother had a 09 Cobalt SS that was acting similar to yours turned out to be a bad coil.

 

In my situation i swapped the coils and the misfire still comes back to cyl 2

 

He did the same swapped coils and still showed misfire on the same cyl. Swapped them back and He took it to the dealer and they said it was a bad coil and replaced it problem never came back on his. Was very strange

 

I will check that out.. im out of warranty though so might have to pay full price... i might just get all 4 depending on price

 

This morning , Started it , No check light , 0 misfires .
Thought what the h-ll's going on ?
Put 70 miles on it , No misfires , No check engine light. Running perfect.
Weird.

 

I now dad , I mean kendal. Hows it going brother ?

Anybody got the k&n lid and want to sell there stock lid ?

 

Nope. Have you cleaned out the MAF sensor? Along with the CPS I'd look at that to see if it's causing any problems. What do your STFT and LTFT look like? Set up the Aeroforces to scan them and see what they're reading and let us know.

Later
Allex

 

Whats the best way to clean the MAF ?

 

I thought I saw some one post a how to, and there was a kit with the cleaner. I'm thinking that spray stuff for cleaning brake parts would do the deed.

 

I tried a search, I guess you got to read 500 post to find it .