Next weird SJ413 problem . . .

OK . . . having bit by bit sorted the various little niggles the
hesitant pick up and occasional petering out of the power when driving
still remained.

Ha! I thought, pump out the tank in case there is water or rust
flakes in there. So, I connected up my electric fuel transfer pump to
the fuel supply pipe at the fuel pump, stuck output pipe into Jerry
and switched on.

The connnection and discharge pipes are transparent and a stream of
air bubbles (around 20 percent by volume)came through with the fuel.
This for six or seven seconds then pure fuel for two or three seconds
(pump loading increasing) then air bubbles for six or seven then fuel
only . . . and so on.

There is no evidence of fuel leakage anywhere between tank and engine
bay yet clearly air is getting into the system intermittently
somewhere!

Anyone any ideas?

Have thought it might be a leak in the fuel pick up pipe inside the
tank, anyone know the geography in there?

Cheers, Lurch

"Lurch" <[email protected]> wrote in message
news:[email protected]...
> OK . . . having bit by bit sorted the various little niggles the
> hesitant pick up and occasional petering out of the power when driving
> still remained.
>
> Ha! I thought, pump out the tank in case there is water or rust
> flakes in there. So, I connected up my electric fuel transfer pump to
> the fuel supply pipe at the fuel pump, stuck output pipe into Jerry
> and switched on.
>
> The connnection and discharge pipes are transparent and a stream of
> air bubbles (around 20 percent by volume)came through with the fuel.
> This for six or seven seconds then pure fuel for two or three seconds
> (pump loading increasing) then air bubbles for six or seven then fuel
> only . . . and so on.
>
> There is no evidence of fuel leakage anywhere between tank and engine
> bay yet clearly air is getting into the system intermittently
> somewhere!
>
> Anyone any ideas?
>
> Have thought it might be a leak in the fuel pick up pipe inside the
> tank, anyone know the geography in there?
>
> Cheers, Lurch

I had a similar problem with a fourtrak the fuel pipe had become porous
(rust)
where it joined with the plastic pipe allowing air to bleed in
Derek


---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.670 / Virus Database: 432 - Release Date: 27/04/04

"Lurch" <[email protected]> wrote in message
news:[email protected]...
> OK . . . having bit by bit sorted the various little niggles the
> hesitant pick up and occasional petering out of the power when driving
> still remained.
>
> Ha! I thought, pump out the tank in case there is water or rust
> flakes in there. So, I connected up my electric fuel transfer pump to
> the fuel supply pipe at the fuel pump, stuck output pipe into Jerry
> and switched on.
>
> The connnection and discharge pipes are transparent and a stream of
> air bubbles (around 20 percent by volume)came through with the fuel.
> This for six or seven seconds then pure fuel for two or three seconds
> (pump loading increasing) then air bubbles for six or seven then fuel
> only . . . and so on.
>
> There is no evidence of fuel leakage anywhere between tank and engine
> bay yet clearly air is getting into the system intermittently
> somewhere!
>
> Anyone any ideas?
>
> Have thought it might be a leak in the fuel pick up pipe inside the
> tank, anyone know the geography in there?
>
> Cheers, Lurch

I had a similar problem with a fourtrak the fuel pipe had become porous
(rust)
where it joined with the plastic pipe allowing air to bleed in
Derek


---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.670 / Virus Database: 432 - Release Date: 27/04/04