so i have come across an 07 civic that has had a bunch of money dumped into after market parts. it has a skunk2 intake, throttle body spacer, skunk cold air intake, a full three inch stainless header, after market cats, then back to stainless all the way out to a an aftermarket muffler. it has upgraded map sensor as well. my question is since im not able to find a vacuum leak is it possible that the injectors aren't able to keep up with all the wind running through this motor? need a higher flow injector? a tune?

 

Definitely a tune.