12 Volt vacuum pump problem

22dog22 said

some good ideas, I will check to see what electric motor power draw, the rated amount of vacuum is rated at 18-22 inches for the pump, the way I have this plumbed is from something I found on the enter net, they showed 2 ways to plumb this up on 2 G-M cars and had not problem , far as the fuse I have it mount inside the car near the fuse box so heat from the engine compartment would not effect it. this pump is a diaphrame type not a squirrel cage type

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diaphrame is the mechanism used to create the vacuum by the driven electric motor (2 types of electric motors, squirrel cage and wound, refers to the relationship of the stator and rotor, setup differently in the 2 different types of motors) as for the heat. the heat soak into the electric motor you are running will cause the motor to pull more current to make up for the efficiency loss caused by the additional heat. Same principle applies to your cars engine. the hotter the air, the more air and gas you need to create the same horsepower on a cooler day.