A bad fuel pump can certainly jerk the engine, specifically when accelerating or at higher speeds. This convulseness happens as a result of a disappointing satiate battler isn’t able to keep on generous the required sating stream, which amounts to interruptions in the systematization of the fuel. If the fuel pump is unable to supply the fuel at a set pressure any where from 40-60 PSI, fuel delivery to the engine is compromised, and the engine will “jerk,” as if starving for fuel and will try to compensate. So even a loss of a mere 10% of regulation pressure can disrupt the air-fuel blend and lead to perceptible power delivery problems and a lumpy ride.
A worn pump delivers low fuel flow, which leaves a mixture of air to fuel within the combustion chamber that is lean with more air than fuel. That imbalance means less power can be produced, resulting in the engine stuttering or jerking as it (or rather failing to) produce even power. For high performance or turbocharged engines in which higher fuel flow rates, but typically more than 200 ๐๐ผ/๐ก, are required, any fall in pump efficiency caused by the hose’s condition is more effective, with jerks through a great load or perhaps place.
If the pump is failing, it may not maintain a constant voltage. Most fuel pumps need a steady 12 volts, but when the pump wears, the voltage can bounce all over the place, which leads to an erratic flow of gas. These fluctuations lead to jerky engine action as the car cannot provide a steady power output. According to records, voltage instability can lead to as much as 20% reduced pump efficiency, which can make it a frequent culprit behind fuel-system-related drivability concerns in older or high-mileage vehicles [4].
Dirty filters in the fuel pump assembly can further isolate these problems by choking off the fuel, forcing the pump to push harder. A clogged filter can cause a 15% reduction in flow, which leads to jerking of the engine, especially when the vehicle is accelerating. This prevents jerking while driving, as long as the fuel pump is working with a constant flow, which should be replaced every 20,000โ30,000 miles or so, and as long as you get regular maintenance.
Inspection of the Fuel Pump and surrounding components โ including the fuel filter and pressure regulator โ is critical in instances where drivers have experienced jerking. Tackling these problems early will not only help restore engine performance, but also prevent lack of proper fuel supply to lifters and valves from causing potential future problems that can permanently damage an engine, helping protect your engine cost in the long run and provide a better driving experience.