I like the logic of the idea but would appreciate a few more details. I am
assuming the ECU senses rpm by some kind of hall-effect sensor or ignition
pulse? That works when you want the fuel pump to turn on but what happens
when you want to kill it? If the engine is already running and you kill the
ECU the rpm sensor is still feeding information. Does the ECU shut down all
solenoids as part of its shut-down procedure? Do you need a "normally
closed" relay so when ECU power is lost the relay automatically goes to its
normal state? An EFI pump consumes copious amps. Can the ECU supply it, or
is there a relay in-line? Sorry for so many questions but you can tell a
MFI guy may be merging into the EFI world :-) -Elon
----- Original Message -----
From: ddahlgren@snet.net, August 30, 2007
Fuel pump switch????? Why noy just let the ecu turn it on..No rpm no fuel..
That way 1 switch turns off ign fuel pump and ecu.. Dave
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