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[ATTENTION! I am not responsible for any damage that may occur to your car. I am just a car enthusiast who learns from the web and shares what he knows]. This is a homemade pressure gauge that I made to evaluate the operation of the fuel pump of my car (Gol Gen. 3). Your fuel pump may require a pressure gauge with another BAR pressure rating or other connectors. The connections must be made calmly and in a very well insulated/tight manner, both to ensure reliable measurement and to prevent fires.