i recently had the exact same problems on the 3.
turned out i had developed
a kink in one of the soft fuel lines that was
restricting the flow of gas.
Frank
To: triumphs@autox.team.net
Sent: Thu, September 16,
2010 7:27:16 PM
Subject: [TR] Fuel starvation in my TR4
I've got what appears
to be the symptoms of intermittent fuel starvation in my
TR4, but I can't
figure out the cause. I'm hoping the list can come up with
some suggestions.
Symptoms:
- Car runs well and with full power for a while after start-up.
-
Loss of power and what feels like a miss under load after it's been driven a
while. Going up a long hill seems to trigger the stumbling. If I let up on
the
throttle, it smooths out. Sometimes it drives well again for a while.
-
Problem seems to be worse when it's really hot out (I live in Austin)
- Engine
idles smoothly even when it's not running well under load.
I replaced the
fuel pump and filter. There is nothing in the fuel pump bowl to
suggest
debris in the system, and the new filter appears to be remaining clean.
I
have a Joe Curry heat shield on the carbs.
The car has never exhibited
anything like this in the 20 years I've owned it, so
I'm trying to imagine
what new factor has entered the picture. I'm suspecting a
couple of
possibilities:
- Vapor lock because of a summer blend gas. I don't know what
the local alcohol
content is, but I'm thinking that it may have a much lower
boiling point than
what I'm used to running.
- Flakes of rust or other
debris caught in the outlet pipe from the fuel tank
that's restricting flow.
Any other ideas?
Thanks.
Dean Mericas
Austin, TX
1965 TR4 / 1974 GTV 2000 /
1976 Giulia Nuova Super
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