Strats-N-Vettes said:
Some cars have a safety switch that turns off the fuel pump in a wreck on the rear of the car.....don't know if the 85 has that.
No GM cars or trucks use a "Ford" style inertia switch. All of them run the fuel pump via fuel pump relay for the first 5 or so seconds of operation, starting as soon as the ignition key is turned to the crank position. As soon as the oil pressure sender sees about 4psi, the oil pressure sender supplies power to the fuel pump.
Also this oil sender powered fuel pump design adds safety as if for any reason the oil pressure drops lower than 4psi IE accident, large fuel leak in pressure side of fuel system, the fuel pump power is discontinued.
|UPDATED|8/7/2015 1:09:58 PM (AZT)|/UPDATED|
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