RE: [doc] Locked Fuel Pump (again!)

["chrisparnham" <chrisparnham1@xxxxxxxxxxxx>]

Peter, I'd concentrate my efforts on the fuel return pipes, strip it
down, inspect, blow our each section, the acetone may well have
partially dislodged a lump of crap.  
 
I have seen this type of intermittent problem with floating debris in
fuel lines before, one on my boat troubled me for 5 years before we
found it! ( only in rough weather when you needed the engine!!)   My
uncle Transit pickup was in and out of garages for months before we
found it our selves. 
 
The only difference is in this case, it sounds like the return line. 
 
This is another of the problems associated with ex USA "stored" cars. 
 
Regarding the Lotus cars, I have heard this so many times before.... A
bit more folk law..
 
Best regards
Chris Parnham
DOC 2
RHD  vin 5638
BTTF vin 20049 
-----Original Message-----
From: doc-uk@xxxxxxxxxxxxxxx [mailto:doc-uk@xxxxxxxxxxxxxxx] On Behalf
Of Peter Filsell
Sent: 20 July 2005 21:16
To: doc-uk@xxxxxxxxxxxxxxx
Subject: [doc] Locked Fuel Pump (again!)
 
Hi guys,


Hope someone can assist!  

Any ideas what would lock the fuel pump apart from dirt in the tank?
Could excess pressure cause a problem? Or maybe something engine side
rather than at the tank?

I have had a problem with 1772 chewing up pumps nearly just as quick as
she drinks petrol!  I thought I cured the problem before Christmas as I
put the mysterious locking down to the pump access panel pinching the
supply hoses. I have travelled some 200 miles without a problem.
However on Monday (which was my 25th Birthday too!)  1772 decided to
play the old cutting out game again through Norwich and yep you guessed
it the fuel pump was locked again.

I know it must sound like crap in the tank but she has had a new tank,
lines flushed out with acetone, new pick up hose and filter in the tank
too!  There is power getting to the pump and the inertia switch has not
tripped either.  

The reason why I wonder if pressure could be a problem is because the
supply hose from the pump to the fuel line split the other day but I
just put this down to an old pipe rather than any specific fault.  After
1772 did cut out I noticed alot of pressure in the supply lines from the
pump.  Especially the return line which was solid although when I
removed it from the pump end the line was dry. 

I intend to check the fuel line at various stages (ie filter, engine
entry, frequency valve, accumulator etc) just to double check for any
foreign material but any other suggestions/ideas of why the pump would
lock would lock would be gratefully received.

BTW after spending several hours on the roadside, the helpful recovery
chap used to work at Lotus and he assures me that there are still 2 D's
at the factory in Hethel!  Didn't quiz him too much as I didn't feel
that reassured by him, although a decent chap but I guess you never
know!

Regards


Peter
DOC328
Vin 1772



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