[TR] Causes of fast idle TR3

[Frank Fisher]

happy new year to all
B 
Since putting the TR3 back on the road I have
suffered an idle speed that I canbt get below around 1300/1400 at best.
Now
that the season is over I decided to fix some things.
When I put the car back
on the road I did not rebuild some parts under the premises of bif it aint
brokeb and i donbt spend cash I donbt have.
B 
B 
Had my distributor
rebuilt by Advanced. Fitted that today.
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Decided to work the carbs myself.
In the past when I sprayed a little starting fluid at the ends of the throttle
shafts it would bog down the motor..Just a little. It did NOT increase engine
speed.
I am running the TR4 PCV valve setup. The round pancake type. All new
diaphragm.
While checking the disassembled carb body I found the old throttle
shafts to be worn. About 0.010b undersize. But I found the existing bushings
to be only 0.002 max out of round and no worse than the new bushings I had to
replace them. So I did not replace the bushings. Max clearance now from new
throttle shaft to old bushings are from .002 to .0035. I have access to a very
big fully equipped machine shop with excellent facilities for measuring. Ibm
confident in those numbers.
Installed new butterfly valves with the Ground
surfaces to mate against carb.
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fitted the carbs today also.
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Got the car
together today and I have no improvement in reducing the idle speed.
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If I
put my foot under the gas pedal and pull it up, I can reduce idle speed by
about 300. it was always like that. adding a spring strong enought to do that
for me made the pedal horribly heavy.
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Disengaged the PCV valve to see if
there was an air leak. No.
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Squirted starter fluif around the intake
manifold. No change in idle speed.
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I guess I did not spray the throttle
shaft again! Duh! Will check that Saturday again.
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Car runs, but not right
just yet. I think I need to play with the timing some. No power at low revs,
kicks into power at about 2000. I think that I just need to mess with ignition
for now.
Exhaust note has changed though. Sounds like a tractor now and I
donbt have the 2500 howl.
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Any thoughts on where to start looking for
cause of idle speed will be appreciated and tried this coming Saturday
B 
Thanks
Frank