Some early VW's ('72 Rabbit ?) used a relay that sensed pulses from the
points to control the electric fuel pump. Probably too expensive new,
but you might find one in a junk yard, on about anything with Bosch fuel
injection and points. The relay is real distinctive, it has a fuse clip
sticking out the top.
I like the oil pressure switch idea better, but instead of trying to tap
into the existing sender, I'd go for a separate switch. You should be
able to find a switch that closes around 5-10 psi in a speed shop.
Randall
"Keith S. Ehrlich" wrote:
>
> A number of folks at VTR suggested I replace my mechanical fuel pump
> with a low pressure electric pump to better feed the Webers. In the
> interest of safety, how could the electric pump be wired to guarantee
> its shutoff in the event of a collision? I heard one concept about
> routing the wiring through the oil pressure sensor, which sounded nifty.
> Any other suggestions?
>
> Thanks
> Keith Ehrlich
> 74 TR6
>
> PS BTW the intermittent power loss I suffered a few weeks back turned
> out to be the mechanical fuel pump ( now replaced), which apparently was
> slowly going bad to the point where it could not keep up with the Webers
> at idle. The bowls would go almost dry before I'd drive off and the call
> for fuel under acceleration would finish off what fuel was left thus
> causing a power loss to follow until the fuel would begin to flow back
> into the bowls under higher RPM pressure. Nasty little problem to find.
> Thanks to all the listers who helped me bracket my way through the
> systems to isolate it.
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