i recently baught a 1993 integra ls, two days after i got the car i drove it still unregesitered to test drive it. around 4500-5000 rpms, the engine studders and the rpms on the tech jump all around dropping and going up. i had a similar promblem in my eclipse and it turned out to be a cam sensor, coudl this be it? or could it be because my exhaust on the new integra is broken after the cat converter and tyhe back pressure is differnt. please help me