Listers,
I have a continuing problem. I am still getting some
stumbling when accelerating hard, or accelerating
in high gear at lower rpms. This only happens after
the car has warmed up to top operating temp.
The following is a list of what I have done:
'74TR6 68,700 miles
1. Replaced points, condenser, plugs (bosch platinum),
plug wires, Lucas sports coil, (connected without
the ballast resistor in effect), plug gap at .035
2. Rebuilt carbs, Grose jets, air flow equalized,
mixture a little rich.
3. Using SU-Zenith Damper oil from Victoria British
4. Timing using strobe is at 10 degrees BTDC with
vacuum retard removed and 3-4 degrees ADTC with the
vacuum connected.
5. Replaced all major vacuum lines
Observations:
a. when rebuilding carbs, one Temp Compensator plunger
moved freely, the other would move, but tended to bind
along the walls of the TC housing. I did not touch the
adjusting nut! Just cleaned and replaced.
b. Again, no problem initially, only when normal temp is
reached
c. Idle is a little rough, just a jerk every now and then.
d. Runs at speed better than it ever has, pulls up to
100 mph with more to spare, and I can drive in a way
as to prevent the stumbling, but I would like to fix
the problem.
e. Noticed that no vacuum in the line coming from the
thermostatic switch on the radiator hose(clogged up?),
so I connected directly to the small line feeding the
switch. Vacuum retard works well, but do not know if
the vacuum is too strong, or too weak.
Since I have replaced everything else, I feel it may
be the Temp compensators. Or is it the thermostatic switch? (none of
the big three have them in stock) What do you think?
Who ever can figure this one out is definitely the King of e-mail diagnosis!
Thanks
Jack '74 TR6 CF23352
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