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As diesel systems operate under high pressure, a single Cummins 5.9 fuel pump isn’t enough to supply the engine with fuel. A Cummins lift pump transports fuel from the tank to a second high-pressure pump, feeding the fuel rail and injectors. While it may not put fuel directly into the engine, a 24v Cummins lift pump still serves a vital purpose. +Read more
If your 5.9 Cummins lift pump is failing, then the engine either won’t receive enough fuel or what it does get will be inconsistent. As diesel engines operate under an exact amount of pressure, any disruption to the system, including one from a 2001 Cummins lift pump, will lead to a loss of power, misfires, or engine stalling. ‘
A failing or dead lift pump for 5.9 Cummins should be replaced. Multiple options are available should you choose to swap out your vehicle’s lift pump. This includes replacing the original pump with an identical stock part or performing a 24v Cummins lift pump upgrade with an aftermarket part. Some aftermarket parts can be cheaper than stock, though they may be less reliable or inefficient. Other aftermarket parts, like a FASS lift pump 5.9 Cummins, are superior to the stock option, promising greater efficiency and improved performance.
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