[Healeys] Tapitty tapping of Fuel Pump

Wed Jun 24 09:59:04 MDT 2020

That depends on the temperature of the fuel and the composition.

If it is under 3,8psi there is no problem as the pump delivers 3,8psi 
(that is the original equipment AUF 301/3/5 or its SU-Burlen replacement 
AZX1308)

Kees Oudesluijs

Op 22-6-2020 om 19:38 schreef Perry via Healeys:
>
> I just finished a 10 minute dash to the past on the internet looking 
> at the clothes pin remedy.  We might as well start talking about motor 
> oil again. Hope not!!!!
>
> All kinds of claims and reasons why clothespins works or not.
>
> Lets run this bit past the mechanics/engineers/experienced AH owners 
> (that’s all of you) out there. How much fuel pump pressure does it 
> take to overcome the bubble caused by the vapor lock? It was suggested 
> it only takes 5 PSI.
>
> P
>
> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for 
> Windows 10
>
> *From: *warthodson--- via Healeys <mailto:healeys at autox.team.net>
> *Sent: *Monday, June 22, 2020 1:21 PM
> *To: *eyera3000 at gmail.com <mailto:eyera3000 at gmail.com>; 
> healey.nut at gmail.com <mailto:healey.nut at gmail.com>
> *Cc: *Editorgary at aol.com <mailto:Editorgary at aol.com>; 
> healeys at autox.team.net <mailto:healeys at autox.team.net>
> *Subject: *Re: [Healeys] Tapitty tapping of Fuel Pump
>
> Explain how they work, please.
>
> Gary Hodson
>
> -----Original Message-----
> From: i erbs <eyera3000 at gmail.com>
> To: Alan Seigrist <healey.nut at gmail.com>
> Cc: Editorgary at aol.com; Ahealey help <healeys at autox.team.net>
> Sent: Mon, Jun 22, 2020 10:46 am
> Subject: Re: [Healeys] Tapitty tapping of Fuel Pump
>
> wooden clothes pins worked great when I lived in Los Angeles.
>
> On Sun, Jun 21, 2020, 7:09 PM Alan Seigrist <healey.nut at gmail.com 
> <mailto:healey.nut at gmail.com>> wrote:
>
>     Hi Gary -
>
>     If you start hearing the pump run really quickly, it can be
>     indicative of vapor lock getting back into the fuel line... can
>     happen at the end of long trips. It's because the fuel starts
>     vaporizing around where the line goes into the floats, and the
>     float jet then is no longer cutting off fuel flow because it is
>     pushing vapor into the float bowls, which leaks out the overflow
>     tube.  As long as your car is running it should be okay, you might
>     use more fuel than normal.  Try wiring a piece of wood to the
>     incoming fuel line - this is an old trick with Atlantics to act as
>     a heat sink on hot days and stop vapor lock on the Atlantics which
>     use mechanical fuel pumps.
>
>     Best,
>
>     Alan
>
>     On Mon, Jun 22, 2020 at 9:12 AM editorgary--- via Healeys
>     <healeys at autox.team.net <mailto:healeys at autox.team.net>> wrote:
>
>         Yesterday I took my Healey BN& out for its first good run of
>         the season -- 75 miles of southern Oregon backroads -- with
>         our local Rogue Euro Car Group. Everything was terrific from
>         start to finish. Car started on the first push of the button
>         after sitting for six weeks, ran smoothly from start to
>         finish, never faltered in restarts, everything nominal.
>
>
>         Except that, towards the end of the run on a pretty hot day
>         (in mid 90s though the car never ran warm all day) as I was
>         cruising along about 40 mph, the fuel pump started tapping at
>         a high rate of speed and pretty continuously -- certain enough
>         so I could hear it behind me. I have a standard original-spec
>         points-style fuel pump, purchased new from Moss about 10 years
>         ago and running without any issues every since.
>
>         Any thoughts from anyone -- could it just have been the heat?
>         As noted, the car never missed a beat, so fuel was getting
>         through the carbs smoothly at all times.
>
>         Anyone?
>
>         Gary Anderson
>
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