[Roadsters] Vacuum Advance Issue?

[John Peltz]

Here's parts and some good info (click the info links) concerning
distributors and Fairlady's

http://www.datsunroadster.com/SUB_SECTION_DIRECTORIES/elec_firing.htm


On Wed, Jun 12, 2013 at 7:45 PM, wattaj <wattaj at yahoo.com> wrote:

> Hello,
>
> I have an issue where at a steady highway cruise speed, just around
> 3000 RPM or higher, I get regular hiccups, sputtering, etc..  If I drop
> below
> 3000 RPM I am usually fine.  The engine will pull strong all the way up to
> where I dare accelerate.  I have always been suspicious of my distributors
> vacuum advance.  Popping of the distributor cap, I tried to manually move
> the
> advance it by sucking on the tube, but it would not budge.  I took the
> advance
> mechanism off the distributor and it was frozen stiff.  After some serious
> pushing I got it to move manually, but would still not move under suction.
>  It
> looks like I should replace the vacuum advance unit.  I am curious if that
> might be the cause of my cruise speed issues?  Thanks in advance (no pun
> intended) for the help.
>
> Cheers,
>
> Alan
> Tualatin, OR
> 67-1600
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