when going from mechanical to electronic fuel pump, should it be wired through the ignition switch so it pumps as soon as the car is turned on and the entire time it is on? or will that much activity burn it out? whats the deal.
Wouldn't think you would want it to run when the key was off. But you may want to connect it to the fuse block from a terminal that is hot when the key is on. Make sure the pump power line is fused, probably by it's own seperate fuse.
In short, the answer is YES. Look for a lead on your fuse panel marked IGN. Check it with a test light, it should only become hot with the keyswitch in the run position. Your fuel pump must be on whenever the ignition keyswitch is in the "run" position. If you are concerned with additional time that the key may be in this position but the engine is not running, then install a oil pressure safety switch. This is a pressure switch that installs "in-line" on the circuit between the ignition switch and the pump, plus requires a port off the motor for oil pressure. It will not supply voltage to the pump until oil PSI is sensed. Since carbs store fuel in their bowls and normally fire right up, the pump will quickly catch up once the oil pressure is present at the switch.
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