I intalled a jwt pop charger and a z tube a couple of days ago and seemed to run just fine the first couple of days now the car has a hard time accelerating and at idle it chugs and eventually dies. is it not getting enough air? what's the deal?

 

could be your MAF sensor was damaged when you did the install ??

 

^That would suck cause they are expensive to replace. Try getting some MAF cleaner as well and clean it if you haven't already.

 

Check to make sure the vacuum tube is securely fastened to the z tube. Could be a cause of your symptoms.