Where can I What Are the Most Common Failure Modes

in

Amman, Jordan

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The barrel and plunger operate in a harsh environment, and their failure is a primary reason for loss of engine power or rough operation. The most common issues are: Wear and Scoring: Over time, microscopic contaminants in the fuel (dirt, water) can act as an abrasive, scoring the finely finished surfaces of both the plunger and barrel. This destroys the tight seal, allowing fuel to leak past and preventing the build-up of necessary injection pressure. Sticking Plunger: If the surfaces become corroded or varnished from old fuel, the plunger can stick in the barrel. This can prevent the pump from building any pressure or cause erratic, uneven injection. Gallling or Seizure: In severe cases, usually from a lack of lubrication in the fuel or extreme overheating, the plunger can weld itself to the barrel, leading to catastrophic pump failure and a complete engine shutdown. These failures almost always result in symptoms like hard starting, excessive smoke (unburned fuel), low power, poor fuel economy, or a complete no-start condition. www.cq-longshine.com/cummi