I have a 91 crx with a 1.6l. When i start it, it idles fine. Then the rpm neddle dropps a little bit then goes back to normal. But the check engine light comes on and now i can not go over 3500 rpms.

 

Its difficult to suggest ideas with this issue, for me at least.. First of all, if your CEL (check engine light) comes on, you need to find out what codes its throwing. I believe you have a blinking light on/in your ecu to detect the codes. Here is a guide I used previously used to check the codes and to read them:

http://www.jspecautosports.com/files...chcenter1i.htm

 

thanks