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You can determine if a diesel pump is faulty by observing unusual engine behavior, such as rough idling, stalling, or decreased power output. Additionally, listen for unusual noises from the pump, check for fuel leaks, or inspect for warning lights on the dashboard. Testing fuel pressure and flow rates can also reveal issues, as can examining fuel filters for clogs. If these symptoms persist, it's advisable to consult a professional mechanic for a thorough diagnosis.

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4w ago

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