[Healeys] car dies at idle

[Michael Salter]

Bob's advice includes some excellent tips but one problem that I have
encountered numerous times that causes the idle speed of a car with SU
carbs to decrease until the engine stops is leakage of the float chamber
needle valves.
Oddly these valves will frequently only leak when the engine is actually
running as there is no overflow from the float chambers when the ignition
is left on with the engine not running.
I have discovered that if you quickly remove the carb dampers and needles
as soon as the engine stops fuel will be found to be leaking out of the
main jet.
I suspect that engine vibration causes the needle valves to leak sometimes.
In the past I used to solve the problem by installing the type of needle
valve with the synthetic rubber tips but those are hard to find these days.

Michael S
BN1 #174

On Thu, Sep 29, 2016 at 8:11 PM, Gil Rockwell <gilrockwell at gmail.com> wrote:

> I’ve used WD-40 in the past to find intake leaks with great success.
> Safer than brake cleaner or brake fluid….
>
>
>
>
>
> *From:* Healeys [mailto:healeys-bounces at autox.team.net] *On Behalf Of *i
> erbs
> *Sent:* Thursday, September 29, 2016 1:40 PM
> *To:* Bob Spidell
> *Cc:* healeys
> *Subject:* Re: [Healeys] car dies at idle
>
>
>
> sorry meant to say brake cleaner. Dot 5 strips paint.
>
>
> Ira Erbs
>
> Portland,OR
>
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-- 
*If you can't fix it with a hammer, you've got an electrical problem.*
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