[FC] vacuum advance question

[BobHelt at aol.com]

In a message dated 12/10/2006 1:11:44 AM US Mountain Standard Time,  
Wild8bill at aol.com writes:

After  setting the timing using a timing light, I noticed that when I rev  
the  
engine that the timing retards very far very fast (from 14 btdc to -4  btdc), 
 
and kind of "catches up" to where it should be over a few  seconds. The  
vacuum advance appears to move instantaneously,  however. If you give it too 
much  
gas too fast, it dies. Is this a  symptom of a bad vacuum advance, or bad 
vacuum?  Yes, I did check for  vac leaks.



Hi Bill,
by -4btdc, I assume you mean 4 atdc. Is that correct? If so, it looks like  
the timing is being retarded instead of advanced. Could you possibly have the  
dist weights installed backwards?  That would cause it.  Also, for a  double 
check, just disconnect the vac line and plug it.Then see what the timing  is.
 
Regards,
Bob Helt