An efi fuel pump should run continuously, weather it has reached appropriate pressures or not, correct?
Will
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Yes as long as the engine is running. Most EFI systems shut the pump off after a few seconds if the CPU does not detect engine running.
Forest
Forest
Most factory units will run the pump for a few seconds to charge the fuel system if you just turn the key to run. Otherwise it gets a signal through the computer that the engine is running. The pump will stay running through a signal from the CPU like forestg states or through the oil pressure switch. Aftermarket systems may use something a little different but work on the same idea.
So if the engine doesn't run after a few moments and the pump shuts off, then what? How does it reset?
Will
Will
Some cases if the ECU senses engine revolutions it will turn the pump back on like in a starting situation. Otherwise turning the ignition off then back on will restart the pump.Seeing as you have to turn our keys off before back to start (unless mine is broken) I guess it doesnt matter.
Blaine
Blaine
Will does your system have a fuel pressure relief valve in the fuel rails attached to a fuel return line back to the tank .. this would ensure an even pressure in the fuel rails by spilling over back to the tank ?
Ron
Ron