It has happened to me once it was the mass cable of the battery that did not make contact in chassis, check the cable well and the route sometimes sulfates or loosen up, then that valve if you are going to disassemble it attention to the pin can fall, check if it comes out with aluminum remains that if so it is the pump that is defective and is losing metal, but I do not know that amount of km you have traveled but first of all, you have traveled but first I said, if you Tenha um cabo auxiliar que você pode colocá -lo da bateria para o motor e os testes, certifique -se de que ele faça o contato e o Puebas se tudo correr bem, eureka, se você não tentar desligar o carro e, se não desligar, use o cabo de solo, pois eu disse que os testes primeiro do motor. saudações