random fuel pump concern
#1
Full Member
Thread Starter
random fuel pump concern
is it normal that i can hear my fuel pump shut off when i try to start my car and hear it come back on when its done cranking? i have a walboro in a FC s4 NA
#3
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#4
Theoretical Tinkerer
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With the stock wiring, the fuel pump does not prime. It only turns on during cranking or when it gets a signal from the AFM/fuel pump check connector with the key 'on'.
The power source for the pump should not lose voltage during cranking. If it does, it is wired incorrectly.
The noise you hear from the back is probably the radio antenna motor. It will start/stop according to the behavior you described.
The power source for the pump should not lose voltage during cranking. If it does, it is wired incorrectly.
The noise you hear from the back is probably the radio antenna motor. It will start/stop according to the behavior you described.
#5
Full Member
Thread Starter
With the stock wiring, the fuel pump does not prime. It only turns on during cranking or when it gets a signal from the AFM/fuel pump check connector with the key 'on'.
The power source for the pump should not lose voltage during cranking. If it does, it is wired incorrectly.
The noise you hear from the back is probably the radio antenna motor. It will start/stop according to the behavior you described.
The power source for the pump should not lose voltage during cranking. If it does, it is wired incorrectly.
The noise you hear from the back is probably the radio antenna motor. It will start/stop according to the behavior you described.
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