![]() ![]() However, newer cars with fuel injection have electric fuel pumps located in the fuel tank and they have different failure symptoms than a mechanical fuel pump. Older cars equipped with carburetors usually have mechanical fuel pumps driven by the camshaft and a follower pin. Symptoms are different between electric and mechanical fuel pumps The point is, perfectly good fuel pumps get replaced because people don’t always know the symptoms of a failing fuel pump or do the proper testing before replacing the pump. If your engine won’t start, takes too much cranking to start or your engine stalls, you may have a bad fuel pump or you may have a fuel pump wiring issue caused by a corroded connection or ground or a bad fuel pump control module. ![]() Repair Topics > Fuel, Fuel pump, Fuel delivery > Symptoms of a bad fuel pump Symptoms of a bad fuel pump What are the symptoms of a bad fuel pump
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