my car has been running fine with my boost and tune for a year straight and all of a sudden when i was driving it today it started acting all weird. i would be driving and when i would come to a stop or let go of the gas the car would just completely stall out and then run real rough. does anyone know what the problem could be or how to fix it?

 

Do a compression test.
Do a leak down test.

When you pull your spark plugs, check them out.

 

what should i be looking for? any ideas on what the problem could be?

 

Well, anything can make a car run "weird" ; however, do those tests first. Those tests can tell you a lot. When you do a leak down test, listen to see where the leak is coming from.

Pull the spark plugs and try to take pictures of it.

 

What fuel management are you running?