I was wondering how to get passed a code 12 on a KOER test. It states that the rpm's are to high for the test. I've tried adjusting the throttle but that didn't do the job. I'm at a lost, I've been trying to get this nagging problem fixed from my car. It is idling crazy. It goes so low when the car is in park to where it sometimes turns off. However, when I'm driving it is fine. After the car warms up, if I turn it off and turn it on, it completely chokes and dies. Also, my battery light comes on here and there while I'm driving. If anyone has any suggestions they'll gladly be taken. Thanks. Oh, i forgot, it is a 90 LX almost stock.