[DML] Re: Fuel accumulator Test

["David Teitelbaum" <jtrealty@xxxxxxxxxxx>]

Clamping off the line is not a difinative test. I much prefer to
remove the relief line coming off the top of the acumulater and clamp
the hose. Then I put a short piece of hose on the acumulater into a
pail. Now you have an infallible visual test. If any quantity of fuel
comes out of the acumulater from that port when you run the fuel pump
you KNOW that the diaphram is leaking. BTW I have seen black chunks
come out. Pieces of a blown diaphram. I prefer to see them come into
my pail rather than into the gas tank. In any case if you do replace a
bad acumulater I think it is good practice to clean out the fuel tank
to get rid of those chunks. This all happens before the fuel filter
you know. Another point to make. When Rob Grady does an inspection
under the car he now pays special attention to that little hose from
the top of the acumulater. He says he is seeing a lot more cars with
that hose all cracked up (probably from age deterioration). If that
hose lets go you will have fuel all over because it is part of the
return circuit for the fuel distributer sending excess fuel back to
the tank.
David Teitelbaum
vin 10757


--- In dmcnews@xxxxxxxxxxxxxxx, "Dave Swingle" <swingle@xxxx> wrote:
> I don't understand that comment. All the fuel hoses are full of fuel 
> all the time. By clamping off that relief line you will stop the 
> accumulator from allowing pressure on the high side to bleed down 
> quickly. This is not a permanent fix by any means but is a very 
> legitimate way to test for the problem. 
> 
> The cold start injector,although electrically operated, still 
> requires pressure from the fuel pump to work. It does not have it's 
> own pump. The reason it works is that it will let fuel thru at much 
> lower pressure than the mechanical injectors. But it still needs 
> pressure and a working fuel pump.
> 




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