[DML] Re: Possible fuel system problem/observation

["David Teitelbaum" <jtrealty@xxxxxxxxxxxxx>]

Actually the excess fuel is returned by the Primary Pressure Regulator
on the mixture unit. The return hose on the accumulator is there  when
the diaphram inside the accumulator leaks. All the accumulator does is
hold the system pressure up for a while after the motor has run (rest
pressure)and it also takes some of the pressure spikes and surges out
so the mixture unit does not see the pulsations from the fuel pump. If
you see fuel come out of the accumulator from the return port (not the
hose) then the accumulator is bad. This is not a good indicator
though, I had an accumulator go bad and because I didn't see any flow
from the return port I thought it was OK. I was wrong because the port
was plugged up inside with bits of rubber from the diaphram inside. I
discovered that after cutting the thing open. Looked like small round
chunks of black rubber. BTW because the pump "overdelivers" fuel it
tends to heat the fuel as it passes through the "relief valve" aka
Primary Pressure Regulator.
David Teitelbaum
vin 10757


--- In dmcnews@xxxxxxxxxxxxxxx, "Gekko@xxxx" <gekko@xxxx> wrote:
>
> Nathan,
> 
> The fuel pump is built to overdeliver both volume and pressure so
that the engine will never starve for fuel, even at high rpm's and full t









To address comments privately to the moderating team, please address:
moderators@xxxxxxxxxxx

For more info on the list, tech articles, cars for sale see www.dmcnews.com

To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews 
Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/dmcnews/

<*> To unsubscribe from this group, send an email to:
    dmcnews-unsubscribe@xxxxxxxxxxxxxxx

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/