[TR] Causes of fast idle TR3
yellowtr3 at yahoo.com
Wed Jan 2 08:50:53 MST 2013
i will post loud and often. :-)
but so far no suggestions at all.
From: Wbeech <wbeech at flash.net>
To: 'Frank Fisher' <yellowtr3 at yahoo.com>;
'Triumphs' <triumphs at autox.team.net>
Sent: Tuesday, January 1, 2013 8:50 PM
Subject: RE: [TR] Causes of fast idle TR3
Please post the successful
result, I have the same problem. I can pull back
on the accel pedal and
reduce the engine speed by 500rpm. Springs are all
good, tight and in the
proper slots. I did notice that a friends 1962
Morgan, TR3 motor, has an
additional return spring off a bracket mounted to
the front exhaust
mani-bolt. I can get a little bog when I spray started
fluid at one of the
newly re-bushed butterfly rods, but the is no play
All the best,
'58 TR3A TS/30766L "Tarbaby"
'62 TR3B TCF/2549L " Aunt B" (in
'68 Land Rover Series IIa 88" "The Beast"
"If you think you have everything under control... You're driving too slow"
From: triumphs-bounces at autox.team.net
[mailto:triumphs-bounces at autox.team.net] On Behalf Of Frank Fisher
Tuesday, January 01, 2013 7:43 PM
Subject: [TR] Causes of fast
happy new year to all
Since putting the TR3 back on the road I
have suffered an idle speed that I
canbt get below around 1300/1400 at best.
that the season is over I decided to fix some things.
When I put the car
on the road I did not rebuild some parts under the premises of bif it
brokeb and i donbt spend cash I donbt have.
Had my distributor
rebuilt by Advanced. Fitted that today.
Decided to work the carbs myself.
the past when I sprayed a little starting fluid at the ends of the
shafts it would bog down the motor..Just a little. It did NOT
I am running the TR4 PCV valve setup. The round pancake type. All new
While checking the disassembled carb body I found the old throttle
be worn. About 0.010b undersize. But I found the existing bushings
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
big fully equipped machine shop with excellent facilities for
confident in those numbers.
Installed new butterfly valves with the Ground
surfaces to mate against
fitted the carbs today also.
Got the car
together today and I have no improvement in reducing the idle speed.
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
for me made the pedal horribly heavy.
Disengaged the PCV valve to see if
there was an air leak. No.
Squirted starter fluif around the intake
manifold. No change in idle speed.
I guess I did not spray the throttle
shaft again! Duh! Will check that Saturday again.
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
Exhaust note has changed though. Sounds like a tractor now and I
the 2500 howl.
Any thoughts on where to start looking for cause
of idle speed will be
appreciated and tried this coming Saturday B Thanks
** triumphs at autox.team.net **
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