Common Reasons that Indicate That Your Injection Pump is failing

Fuel injections are some of the worst problems drivers can deal with. That’s because they result in engine performance issues, and your engine is like your vehicle’s beating heart; without a properly running engine, your ride is next to useless.

Fuel supply issues are an especially tricky ordeal. When your engine doesn’t receive fuel, it’s basically starving to death.

​What is a Fuel Injection Pump?

Before getting any further, we need to make sure you’re familiar with what a fuel injection pump is.

A diesel fuel injection pump is a mechanical device that pumps diesel into the automotive internal combustion chamber of the engine. It also maintains the rhythm of your engine, helping it run smoothly for several years.

Your injector pump’s main task is feeding fuel to the engine, which it does by compressing the fuel under high pressure. The fuel is sent from the plunger to the injectors. This pump can adjust fuel quantity alongside engine speed. It also atomizes fuel to improve ignition, which results in full combustion. This means more power for your engine.

Common Causes of GM Duramax Injection Pump Failure

Dirty Fuel: One of the most common causes of fuel injector pump failure is subpar fuel. Over time, as grease and junk build up inside your fuel system, it can eventually clog the fuel injector pump. If you notice engine problems while you’re accelerating, that’s usually a clear sign the injector pump is clogged.

Driving on Almost Empty Fuel: Never drive with your vehicle on an almost empty fuel tank. This can create problems for your diesel engine. Instead, make a habit of always driving with at least one-third of a full tank at all times. A full tank provides proper lubrication for your injector pumps. An empty tank causes air to enter it, and your injector pump bearing will wear out more quickly.

Deposits in the Injector Pump: A buildup of dirt, debris, and pollutants in your GM Duramax injectors will eventually cause the pumps to fail. There are two types of deposits: internal injector deposits and external injector deposits. Internal diesel injector deposits (IDID) cause the injector’s internal parts to stick together, while external deposits build up on the outside tip of the injector. These deposits can cause power loss, rough idling, or drain your fuel efficiency.

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Q. What are the most common signs of a failing diesel injection pump?

A. Common warning signs include hard starting, rough idling, poor acceleration, loss of engine power, excessive smoke, and reduced fuel economy. If your engine struggles to receive the proper amount of fuel, the injection pump may be failing and should be inspected.

Q. Can dirty fuel damage an injection pump?

A. Yes. Contaminated or poor-quality fuel can cause dirt, debris, and sludge to build up inside the fuel system. Over time, these contaminants can clog the injection pump and restrict fuel flow, leading to performance issues and potential pump failure.

Q. Is driving with a low fuel tank bad for a diesel injection pump?

A. It can be. Diesel fuel helps lubricate critical fuel system components, including the injection pump. Frequently driving with very little fuel in the tank can allow air into the system and reduce lubrication, increasing wear on the pump and related components.

Q. How do injector deposits affect engine performance?

A. Internal and external injector deposits can interfere with proper fuel delivery and atomization. As deposits build up, they may cause rough idling, decreased power, poor throttle response, increased emissions, and lower fuel efficiency.

Q. How can I extend the life of my diesel injection pump?

A. Regular maintenance is key. Use high-quality diesel fuel, replace fuel filters according to manufacturer recommendations, keep contaminants out of the fuel system, avoid running the tank near empty, and address performance issues early before they result in major fuel system damage.