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What is the reason for not hearing the fuel pump sound when turning the key?

2 Answers
KalebDella
07/28/25 9:56pm
The reasons for not hearing the fuel pump sound when turning the key are as follows: Fuel pump damage: The fuel pump is damaged. The fuel pump does not start, and no oil pressure is established. During secondary ignition, the crankshaft sensor forcibly starts the pump. The function of the fuel pump is to draw gasoline from the fuel tank and press it through the pipeline and fuel filter to the float chamber of the carburetor. Insufficient fuel: First, check whether the fuel level is sufficient and see if the fuel pump can draw fuel. If the fuel level is sufficient, check the fuel pump fuse. If the fuse is not broken, it is recommended to go to a 4S service station to check the fuel line, not the clogged fuel filter.
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GriffinAnn
08/12/25 2:31am
I've encountered this issue several times before. After turning the key, I didn't hear any sound from the fuel pump at all, which really worried me. There could be several possible reasons for this. The most common one is a blown fuse, especially the one dedicated to the fuel pump. If the current is too high or there's a short circuit in the wiring, it will melt to protect the circuit. Another possibility is a faulty relay. That component controls the on/off function of the fuel pump. If the contacts wear out, the signal won't get through, and naturally, the fuel pump won't work. The fuel pump itself could also be the problem, such as a seized motor or aging seals causing it to stop running, or loose/oxidized wiring connectors leading to poor contact. I remember one time when I spent ages troubleshooting, only to find out that the undercarriage wiring had water ingress and rusted, causing a short circuit. After cleaning it, everything worked fine. In short, don't delay with these minor issues; troubleshoot early to avoid getting stranded on the road. First, check the fuse box and relay locations yourself, referring to the manual to find the corresponding components. If that doesn't work, you'll need to consult a professional mechanic for diagnosis to avoid further trouble.
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