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Fuel transfer pump12/28/2023 ![]() Because the fuel pump in most vehicles is in the fuel tank itself, the fuel in the tank keeps the pump from getting too hot or drying out. If the fuel tank contains too much moisture-caused by water forming inside the tank and separating from the fuel into its own threatening layer-then the fuel pump is subject to rust and corrosion as oxides form on the pump’s sensors.Īnother source of failure stems from wear expedited by improper lubrication and overheating. It’s helpful to correlate them with their causes-this is something customers will appreciate.Ĭorrosion and contamination both contribute to fuel pump malfunction. Simply pointing out the obvious signs of fuel pump problems to shop visitors isn’t always enough. Not enough fuel can cause the engine to stall. If the fuel pump sends too much fuel to the engine, drivers will experience uncontrolled spikes in acceleration and RPMs. If the engine starts normally and runs fine at slower speeds but sputters or stalls at higher speeds like highway driving, a malfunctioning fuel pump could be the culprit.Įngine surging – Inconsistent fuel transfer indicates a failing pump. This will rob the engine of the fuel needed to start smoothly, or at all.Įngine sputtering – Another telltale sign of low fuel pressure. Weak or difficult engine starting – Many things can contribute to poor or sluggish starts, and a dip in fuel pressure is certainly one of them. In either case, there are some common fuel pump trouble signals that customers should be aware of: The fuel pump’s primary role is to move fuel from the fuel tank to the engine, but if it contains a built-in regulator (a feature not found on all fuel pumps), then it also regulates fuel pressure, which can seem to mask the severity of certain malfunctions. Like any wearable part in any vehicle, fuel pumps will show indications if they experience problems during their service life. Helping Customers Know the Signs of a Failing Fuel Pump Shop owners and technicians can help customers understand the function of the pump itself and the signs of failure to watch out for. Explaining this to customers isn’t always easy, especially because many of them may not know that the fuel pump has more than one role. Fuel pump failures are never a one-size-fits-all diagnosis.ĭifferent symptoms indicate different problems and often, the pump will still function-albeit erratically-as it fails.
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