Hi Guys,
When I was getting my '73 together this spring I was trying to time it
with the light. Wasn't satisfied with the pull through the gears so I
put the light away and decided to just advance the hell out of it til it
pinged under load at 35 to 40 MPH then back it off a bit. Kept advancing
and never did get it to ping. I remember I did check after and only
remember that it was quite far up the scale. I think the reason I
stopped advancing is that it started to buck a bit when cruising through
town in third gear with no load on the engine. I am only running 87
octane. What confuses me about this problem, if I remember correctly, is
that Chris was quite sure that he was running well at 12 degrees at one
point in time..... I have Juno and Outlook accounts at work and Juno at
home so please excuse me if I seem disjointed at times:-)
Jay
On Sat, 27 Oct 2001 11:45:30 -0700 (PDT) tr6taylor@webtv.net (Sally or
Dick Taylor) writes:
> Bill---It's possible for the timing pulley and its internal
> composition
> to disintegrate over time, and maybe cause a false reading, as you
> suggested. I've just never seen one in this shape.
>
> I can't explain why changing the initial timing would lessen the
> stumble
> either. Typically a torn diaphragm just shows up as a sluggish
> engine,
> as the air piston won't rise to let in air and fuel in that
> particular
> carburetor. The engine should still run without stumbling. (The
> engine
> will run on the 'good' carb.)
> No oil in the dashpot can let the piston rise too quickly, and cause
> a
> temporary lean out. This can show up under load, but not usually
> when
> just revving the engine.
>
> It appears that Cris has a problem shared by several owners of late
> model TR6's. It would be interesting to know if advancing the timing
> as
> much as he did would solve the symptoms of the others. Maybe we'll
> get
> some feedback here?!
>
> Dick Taylor
> '73
|