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Why is there power to the fuel pump on your 1990 Chevy blazer but it will not pump?
Wiki User
∙ 11y ago
Bad fuel pump?or bad relay,when you first turn on the key,the pump should purge fuel to start for around 5-10 seconds then when you car starts there is a oil/fuel sending unit that screws into the block behind the distributor,this will allow your fuel pump to work once your motor has oil pressure,if you have no or low oil pressure the sending unit will not supply 12 volts to the pump,the relay works when you first turn the ignition switch on then the sending unit takes over
Wiki User
∙ 11y ago
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