Typically, you may drive for 15 to 30 minutes, and then suddenly stop working and the engine gets hot. If after letting the engine cool down it functions appropriately again — only to repeat the behavior — this is a good sign the fuel pump is failing.Click to see full answer. Herein, how long can you drive with a bad fuel pump?Fuel pumps have even been known to last more than 200,000 miles. Experts say that after 100,000 miles, your fuel pump is more likely to fail if you are replacing a nearby part that plays a major role in the engine.Beside above, how do I know when my fuel pump is bad? It’s important to familiarize yourself with the warning signs of a faulty fuel pump—that way you can address any problems before it’s too late. Engine Sputters at High Speeds. Rising Temperature. Fuel Pressure Gauge. Loss of Power When the Vehicle Is Under Stress. Surging. Decreased Gas Mileage. Engine Will Not Start. Also to know is, will my car still run with a bad fuel pump? Difficulty Starting Because fuel pumps constantly run whenever the ignition is turned on, they can eventually wear out and weaken over time. A weak fuel pump may still pump fuel, but the vehicle may experience difficulty starting from the lack of pressure.What happens when fuel pump goes out while driving?1. Engine suddenly stops while driving. If the fuel pump shut off switch malfunctions while the engine is operating it may shut off the fuel pump and cause the engine to stall. The fuel pump may be reactivated by finding and pressing the reset button for the switch.

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