One minor quibble with Henry's description : connecting the vacuum advance
should have NO effect at normal idle. If it does, your throttle plates are
too far open for some reason.
It's difficult to time a TR3 accurately with a light, because the
centrifugal advance starts at below idle speed. Since the advance itself is
considerably less than perfect, especially if your distributor is a little
worn (as most of them are, after 40 years of use <g>), the timing reading as
the advance starts is uncertain.
Setting static timing, then 'fine-tuning' it on the road (as specified in
the factory manual) works much better.
59 TR3A daily driver
> -----Original Message-----
> From: email@example.com
> [mailto:firstname.lastname@example.org]On Behalf Of Henry Frye
> Sent: Tuesday, October 12, 1999 5:22 AM
> To: david cook
> Cc: email@example.com
> Subject: Re: timing tr3
> Then reconnect
> the vacuum advance and check again. The pulley should be in a
> location at idle then it was at idle with the vacuum canister
> dissconnected. If both these tests are good, proceed. If not,
> you need to
> repair the offending advance.