daca ai scos din ecuatie restul (filtru benzina, regulator, furtune vacuum, debitmetru etc), sunt sigur ca pompa era guilty. Symptoms of a Bad Fuel Pump Fuel pumps stop working due to a variety of reasons. Once this happens, the supply to the injectors is automatically stalled and the vehicle stalls as well. The effect is similar to the problem of running out of gas. Another problem associated with the pump is proper functioning of the electrical mechanism of the pumping system. The electrical supply consists of devices like the relay and the fuse. If the fuse or the relay develop problems or blows off, it will again result in breakdown, as the driving mechanism for fuel supply is cut off. Another major symptom of a bad fuel pump is overheating. If the fuel pump gets heated frequently and within few minutes of turning on the vehicle power, it is a sign that the pump needs replacement. A bad fuel pump will also show signs of frequent stopping or intermittent breakdown. It will work for around 15-20 minutes and stop working. Once, the vehicle is allowed to remain idle for around 30 minutes, the engine gets cooled off and the pump functions normally. Such a problem is an indicative sign of a bad fuel pump. If the flow to the fuel injection system is not constant, the engine may develop problems. Signs include a hesitant start or a stumbling problem on ignition. If small, unwanted debris or grainy particles enter the pumping system it can cause vehicle breakdown, thus, abrupt stopping of a vehicle can also be considered a symptom of a bad fuel pump. If the filtering mechanism develops a problem or gets struck up with impurities, the engine will show symptoms like rough firing and fickle working. A reduction or drop in fuel supply to the engine causes symptoms of a low power engine and working problems if the problem persists for a long time.