i bought a car a few years ago and am having some idle problems. its a 96 civic dx coupe with a 94 integra ls swap. it has a really rough idle and wont stay steady untill 3500+ rpm. could it be the computer?? it wouldnt make through emmisions the guy couldnt get any singnals back from the car. is it as simple as throwing a p74/75 computer in and its all fixed???