hello i just put on my injen catback exhaust and since then i have noticed a rough idle it the shifter shakes and moves alot is this normal or is there something wrong?

 

Your catback has nothing to do with a rough engine idle. Rough idle = misfire/vacuum leaks/bad motor.

 

Check for leaks at the flange between the cats and your exhaust system. You did use a gasket there, right?

 

yeah i used a gasket and theres no way i could have a misfire me and my friends s2k are dead nuts and hes got gears and a full exhaust so idk ill check everything maybe its a vac leak cause it wasnt doing it before that?

 

does the grounding wire in the back have anything to do with it? lol

 

Nope. Mine's broken