Originally Posted by
90civicGL
I could be wrong as its been a long time since ive done it but i remember reading in the service manual that if its the leads or dizzy cap you can tell by pulling out each lead one by one and listening for rev changes, in theory if its working then the revs will drop i think, and if its not working when you pull it out nothing with change since it was working to begin with.
However i could be wron and it might be a test for something else. just get another member to confirm before trying it.