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Is it normal for a newly installed fuel pump to make a humming noise I never heard it when the old one was in I would hear it start when i turned the key to the on position but no noise after that?
Wiki User
∙ 14y ago
Yes, it is quite common. This is the fuel system priming itself, ie building up pressure in the system so it can inject fuel into the cylinder. It could be that your old pump was wearing down and so didn't make any noise, but more likely that you are now looking for noises from that area and the pump has always done this.
Wiki User
∙ 14y ago
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