I recently installed a spectre Cold Air Intake in my 2011 3.6L camaro. while installing, i did not disconnect the battery. after installation, i drove the car and immediately noticed the difference. RPM seems to stay high on idle and when shifting from first to second, rpm will literally stay high. A couple hours later check engine light came on. i went and unpluged the negative part of the battery for 45mins then drove it. it drove fine for 2mins then did the same thing. the check engine went away but came back on half a day later. PLZ HELP!!!! i don‘t know what to do.
Technically you may get a better sound by a freer flowing air filter, like KN.
More than likely the *Mass Air Flow Sensor has been contaminated by the oil on the air cleaner.