[TR] TR4A Sputtering

[G.D. Huggins]

Brian,

Had the same issue with my TR4A a while back.

For reasons that will be apparent later, I need to state that I have an
electric cooling fan which I rarely turn on.
I use it only at stops, or slow driving.

After close to an hour of highway driving, the car would act like it was being
starved of fuel.

I checked everything out (carbs, floats, spark, etc.) and everything looked
OK.
Plus, the problem would go away after I stopped for a little while.

One day, for an unrelated issue, I installed one of those shiny heat shields
for the carbs, and the problem went away!
My theory is that running for long periods without the cooling fan on was
causing enough trapped heat around the carbs to create a running condition
akin to vapor lock.



On Aug 14, 2014, at 3:07 PM, Brian Thomas <thomasb at queensu.ca> wrote:

> Hi,
>
> I've been fighting a problem with our TR4A for a couple of years and it
just
> won't go away.  Symptom is a "sputtering" at high-way speeds.  Performance
> seems fine - it just becomes no fun on longer trips.  Our annual fall
sojourn
> to Stowe is coming up and I'm looking for ideas.  So far:
> *       replaced defective stainless steel muffler that had incomplete
welds
> on the intake - lifetime warranty honoured by TRF - thanks guys!
> *       fixed problem with coil to distributor wire which was not fully
"home"
> in distributor resulting in pin making poor contact - checked all other
plug
> wires at pins - ok
> *       installed NEW plug wires (yellow/black) and distributor cap
> *       perhaps unrelated, but replaced fuel pump that went bad 2 years ago
in
> Stowe - replacement was Moss reproduction
> Any thoughts?
>
> Cheers,
>
> Brian
> _______________________________________________________________________
>   Brian Thomas                    E-mail:
> ThomasB at QueensU.Ca<mailto:ThomasB at QueensU.Ca>
>   92 Wyona Lane, R R 1       Phone:  613-385-1947
>   Wolfe Island,  Ontario      Toys:     54 TR2,  56 TR3,  67 TR4A,  01 XKR,
> 75 John Deere 920
>   CANADA   K0H
>
> ** triumphs at autox.team.net **
>
> Donate: http://www.team.net/donate.html
> Archive: http://www.team.net/archive
> Forums: http://www.team.net/forums
> Unsubscribe/Manage:
http://autox.team.net/mailman/options/triumphs/guy@genfiniti.com