my car when i start excellerating takes a second ...it "bogs?" is that the rright word. looked at the exhaust its broken before muffler and after cat... im supprised it hasnt fallen off... anyway would that cause that .. and also i have different idle's on the rpm sometimes it falls low sometime high i was thinking either that or the IAC anyone have any ideas? also when i get exhaust is 2.25 a good diamter im getting it monday or 2.5? anyone thanks lol

 

its an exhuast leak. get it fixed.

 

get 2.5"