[T77911S]

i have an old snap on timing light, non adjustable. for some reason i just dont trust the ones that have the dial to dial in the advance.

i dont know how far mine was advanced but it was at the limit if running. the idle have a VERY distinct high pitched idle to it. (not RPM wise.) i have always said i prefer to have my vacuum retard connected because the idle sounds much better. it has a deeper throaty sound to it, which goes to say why the idle sounded high pitched and thin with timing advanced. "thin" is a good way to describe it. i think it may have been popping too, not sure.


does the timing advance as you increase the RPM's
have you tried retarding it to see how it runs
if you drive it and put it in say 3rd or 4th at a slow speed and floor it, does it spark knock