Ian and Rob:
Slop in the distributor will definitely cause a TR6 to miss under load, and is
more
apparent once the car is warm.
Installing some kind of electronic ignition will eliminate or radically reduce
the
problem. (Better still, rebuild the dizzy, and then add electronic ...)
--
Martin Secrest
72 TR6
73 GT6
Rob C Swift wrote:
> Hello Ian,
>
> I am eager to hear about this thread as my '6 shares similar
>simptoms. I
> believe in my case that there is a good posiblility that the bushing wear in
> my distributor shaft causes my rotor button to actually glance across some
> of the contacts, causing rough idle. I don't know if this explains why it
> seems to be much worse at warm engine temperatures over cold, but I do know
> that pulling off the vaccum advance hose (from the side of the distributor)
> gives me significant relief to the problem. You may want to try this as
> temporary relief, unless another lister can tell us of a major downside to
> doing this!
>
> Good luck
>
> Rob Swift
> '75 TR6
>
> -----Original Message-----
> From: owner-triumphs@autox.team.net
> [mailto:owner-triumphs@autox.team.net]
> Sent: Monday, July 10, 2000 4:10 PM
> To: triumphs@autox.team.net
> Subject: TR6 intermittent miss
>
> Esteemed Listers:
>
> What causes a '76 TR6 to stumble while accelerating after warming up?
> Here's the scenario:
>
> * Car starts easily and warms to operating temperature normally (temp
> gauge works fine).
> * For the first 15 minutes or so, it runs almost perfectly (only very
> occasionally do I feel a slight misfire as I accelerate)
> * After about 15 minutes, or if I shut the car off and restart it, the
> engine is considerably rougher, missing as I engage the clutch at lower
> rpms. Even in the upper gears, if there is any load on the engine
> (accelerating up hills, etc), it stumbles much more noticeably than it did
> after just warming up. Accelerating through higher rpms, the problem seems
> to go away, but the next time I accelerate from a red light, it stumbles
> again.
> * Bottom line: the problem is almost unnoticeable for the first 15
> minutes or so after warming up regardless of rpms or engine loading. It's
> very noticeable after that at lower rpms under load.
>
> The engine is original with a legitimate 53,000 miles on it. Compression is
> about 115 to 125. It has new plugs, condenser, points, plug wires and sport
> coil. Valve guides leak a bit and the carbs leak dashpot oil (through what
> I assume are bad O-rings). Timing and valve adj are per spec, but I opened
> the plug gap to about .30 to take advantage of the sport coil
>
> Anybody experience this before?
>
> Thanks.
>
> Ian
>
> CF57345UO
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