just put new spark plugs in my 08 ss and now its miss firing....and i dont know why, i went through everything i did and am not sure why its runing choppy now, any suggestions please

 

run good before the plugs, runs bad after ? Must not like that flavor of plugs, how did the old ones look ?

 

the old ones were a new shade of black and i know it needed to be done, and now its running choppy as hell

 

What kind of plugs did you install?

 

You may also have a bad coil. I just had to replace one recently.

 

X2. If it was running good before,then something happened during install. Check your coils.
P.S. Welcome to the forum "cmraman".

 

welcome cmraman Did you get the same plugs the factory put in there ?

 

If you didn't install OEM plugs gapped at .032-.035, you might want to try that.

 

i installed o'reilly brand performance plugs and i came to realize that for one i didnt put them in all the way and 2 my car didnt approve of them i put ac delco from gm in there and ran like new....so my lesson learned was dont use o'reilly brand stuff caus my hhr pukes them back out lol