Function&Feature
 

    Many cars today, locate the fuel pump inside the fuel tank. While mechanical pumps operate on pressures of 4-6 psi (pounds per square inch), electric pumps can operate on pressures of 30-40 psi. Current is supplied to the pump immediately when the key is turned. This allows for constant pressure on the system for immediate starting. Electric fuel pumps can be either low pressure or high pressure. These pumps look identical, so be careful when replacing a fuel pump that the proper one is used. Fuel pumps are rated by pressure and volume. When checking fuel pump operation, both specifications must be checked and met.

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