Kyle
After reading this a couple of times, and Dick's
reply, two things come to mind.
First: You stated that you have a Crane ignition
system in your car. In my case there were two optic
window rotors. One with a curved opening and the other
with a straight limited opening. If you have used the
curved one it gives a spark bounce at various rpm's.
This may be your problem, if you have use this rotor.
Change to the straight one and see if there is a
difference.
Second: It also sound like it could be a vacuum
leak. If you have a can of ether, with a tube nozzle
from a can of WD-40, that you can direct the spray to
areas such as the intake manifold and the carb
mounting points to see if there is an increase in
engine rpm's. Have a fire extinguisher available and
do not do this with a hot motor.
Like Dick said try the simple things first before
you go buying a bunch of parts. Keep the list posted
on your progress.
Dale
--- "Kyle K. Rice" <kkrice@earthlink.net> wrote:
> Everyone,
>
> I have a high rpm miss on my 74 TR6. At about 45-70
> mph, there is a slight
> miss which occures at random times but occures
> often. I am not sure where
> to start looking. Could this be caused by the
> carbs, ignition, exaust leak,
> intake leak, vacume leak, electrical, timing, ???
> The engine is newly
> rebuilt as are the carbs. It passed smog in
> California with flying colors.
> The car has the following:
>
> crane elec. ignition
> sport exaust
> Good Parts ram air air cleaner
> all new hoses including vacume hoses
> British Parts Nortwest mild cam
> Rebuilt head with valve seals
>
> The car starts fine with the choke on but will not
> idle with out me pressing
> on the gas pedal. Once it warms up, it idles around
> 800 but kind of rough.
>
> Can anyone give some insight on the possible cause
> and cure.
>
> Thanks Kyle
>
> Kyle Rice
> kkrice@earthlink.net
>
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