The other day i turned my blow off valve upside down so i can run my engine cover again and since then my car seems to pop and backfire on a decel, usually only under 2k rpm's and i also noticed the car seems to chug and slightly buck when you try to maintain a certain speed,when i took the blow off valve off i didn't touch the maf at all and double checked all the couplers on the charge pipe to make sure they were tight. There's no cel either so im stumped.Any one ever ran into a problem like this before ??

 

Post a picture of how it currently sits and how it used to also.