Glen that is not actually the case, If one Pump became blocked, ( There
are small mesh filters on the inlet) the second pump would draw its
fuel around the Bi-pass pipe and Non-return valve,
But i agree i would also prefer the Parallel system,
On the Pierburg website there no mention of running these pumps in series ,
schematics only show parallel, Makes you wonder!!!
> I switched the pumps on my setup from series to parallel as the Ellison
> throttle body
> on my Subaru setup only requires 3 psi. One big negative on two pumps in
> series is that if
> there is a blockage, both pumps are taken out. In the parallel
> arrangement,
> if one pump
> gets blocked, the other pump can still deliver fuel.
>
Ivor Phillips
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