I just supercharged my 2006 cobalt SS automatic 2.4 liter. I used ZZP's supercharging kit to supercharge it. The one issue I am having is when ever I try rev past 4,000 rpm the engine pops and wont give power. However, if i keep the rpm below that I am not having any issues. Any idea what the issue might be?

Thanks!

 

​​​​​​​how does it pop? Does it pop after releasing the throttle? Or during reving? Sounds like it might be going lean. Do you have a wideband?

 

Canned tune? Most likely fueling issues if you don't have any codes for disconnected MAF or something like that.

 

Video? What spark plugs are you using? What's the afr when this happens? Need more details.