| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 2264.1 | Austin 1300 but not aSprite | BAHTAT::CARTER_A | Rozan Kobar! | Mon May 23 1994 11:24 | 10 |
| >> I notice that the fuel pump gives a small 'clunk' about every 7
>> seconds EVEN when the engine is stopped (ignition on).
On my old Austin 1300, the electric fuel pump kept going when the ignition
was on even if the engine wasn't. I never actually listened to it, but
I took it apart once and it seemed to work by flexing a diaphragm which
could explain the clunk. Is the fuel pump you have fitted, standard?
Perhaps you should up the idle speed to use the extra petrol? :-)
Andy
|
| 2264.2 | Fuel for thought. | FILTON::KING_M | | Mon May 23 1994 12:10 | 12 |
| I recall my days nursing a GT6 with Stromberg carbs some years ago
having a similar problem. Basically the fuel pressure was too high,
thus forcing the needles down on tickover but OK when throttle open.
The fix was a device (cannot remember the name) which fitted between
the pump and carbs and regulated the pressure on tickover. It also
claimed to save x-miles_per_gallon and improve performance. I never
really drove in a fashion that was conducive to economy then anyway,
so cannot vouch for the latter claims! - But it did stop the pools of
fuel.
BTW- Is the Electric pump standard/neccessary? if so can you "turn it
down"?
|
| 2264.3 | | PEKING::SMITHR1 | "Cracking toast, Gromit!" | Mon May 23 1994 14:11 | 7 |
| re -1
Wasn't an In-Reg Fuel Saver, by any chance? -not that I know anything
about them, I just remember the name...
Richard
|
| 2264.4 | in reply | ESSB::DOODY | | Mon May 23 1994 14:39 | 18 |
| re.1 What you are describing can be caused by a minor air leak on the
tank (inlet) side of the petrol pump ie. the pump turns over
continuously. With my problem there appears to be no air leak
(no bubbles in the fuel as delivered at the carbs)
-- The electric pump is standard.
re .2 All the evidence points to this solution in my case also and
reading your experience backs this up further.
I think the device you are referring to is a 'Filter King' ??
-- I dont know if the SU type pump can be regulated for delivery
pressure??
THanks for all those replies,
Brian.
|
| 2264.5 | | PLAYER::BROWNL | L-plates on the Info-Highway | Tue May 24 1994 12:36 | 4 |
| I'd suspect the pump, especially as both carbs are flooding. Get
another pump from a srapper, and test it.
Laurie.
|
| 2264.6 | Buy new seats ? | CMOTEC::JASPER | Stuck on the Flypaper of Life | Tue May 24 1994 13:18 | 14 |
| In my experience the pump will always pulse at a slow rate, I have put
this down to pump inefficiency, i.e. back-leakage to the tank from the
pressurised fuel line. I dont know how you can stop the flooding
though, I've always used genuine BL replacement needles to cure the
fault. I remember the filter-king, in fact I've still got 2. The
principle has since been adopted by manufacturers, there's one on my
Carlton I'm sure. I Guess you've also changed the needle seats ?
Those needles also caused an intermittent power-loss on a Mini I once
had, whereby they would either stick open or closed.
Frustrating isnt it. My money is on a pair of new Carb-tops, i.e. new
needles & seats.
Tony.
|
| 2264.7 | pressure too high | YUPPY::TILLINGS | | Tue May 31 1994 15:48 | 10 |
| This may be a bit late but.....
What you need is a fuel pressure regulator. They are about #16.00 from
someone like Deemon Tweeks or such like.
Cheers,
Simon,
|
| 2264.8 | Problem cured thanks! | ESSB::DOODY | | Thu Jun 09 1994 16:48 | 11 |
| Cured....
I have fitted a Filter King pressure regulator and it has done the
trick. NO leaks, theres now a detectable pulse in the fuel pipe on the
hi pressure side of the regulator but not on the carb end.
Obviously the pump was (is!!) overpressuring the system
Thanks everyone
Brian.
|