[TR] TR6 ZS Carb/Timing Questions

[Tim Gaines]

Bill,

When I bought my 1974 TR6 nearly 20 years ago and then tried to sort out all the ignition and carb issues left by the dpo, I faced a similar problem with high rpms.  Then I learned that the disconnected vacuum unit on the distributor had a timing retarding function at idle.  Despite advice from several on the list to just leave it disconnected, I found that rpms dropped down nicely with that unit reconnected.  Even better, the idle steadied dramatically even at very low rpms, and I have never had another problem with the idle since.  I can't remember what years have the vacuum retard unit, but you might want check yours and see if it is functional.

Tim Gaines
Clinton, SC
1974 TR6
1980 Spitfire 


--
Jeff Scarbrough
Corrosion Acres, Ga.

On Sat, Jan 24, 2015 at 8:13 PM, William Brewer <wsb1960tr3a at att.net> wrote:
>     I am trying to get my TR6 back on the road. I can't seem to get the
> timing set right. I had the distributor rebuilt at advanced distributor. It
> runs much better, but the idle is really high with the idle adjustments
> backed all the way off. The engine starts and stops easily  and doesn't
> smoke.  We adjusted the chokes so they are off when they are supposed to be.
> The one thing that is confusing is that we removed the large vacuum hoses
> that connect the ZS carbs to the valve cover and the idle dropped 400 rpms
> with those ports open. My friend and I both agreed that if the carbs were
> running rich then the engine would have been smoking when we revved it.
>      Any ideas or suggestions for the list?
>      Does anyone have a link to a basic "How to troubleshoot
> Zenith-Stromberg carburetors?
>
>      TIA,
>
>      -Bill Brewer
>      Tehachapi, CA
>
>
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