A diesel fuel injection pump is a critical component of your diesel vehicle’s fuel system. While its primary function is to send fuel to the engine’s internal combustion chamber, there are a variety of factors that can impact its performance. And, when the fuel injection pump isn’t working properly, overall vehicle performance can suffer, too.

Today, let’s look at some of the most common diesel fuel injection pump issues we come across at our Tempe auto repair shop. Then, we’ll let you know how some of these problems can be avoided so you can save yourself time, hassle, and money.

Diesel Owners: Be Aware of These Common Diesel Fuel Injection Pump Problems

1. Low fuel pressure – Modern diesel fuel injection pumps operate under pressure between 30,000 and 40,000 psi (pounds per square inch). When low fuel pressure occurs because of a clogged fuel filter or weak pump, the engine may stall or simply perform poorly.
2. Dirty diesel fuel – If you put contaminated diesel fuel into your vehicle, dirt or debris can clog the fuel injectors. This will lead to reduced engine power and lower fuel efficiency.
3. Worn out components – Like any other vehicle part or system, a diesel fuel injection pump will show wear and tear. When its components wear out or break down, you may notice leaks, poor overall performance, and lower fuel pressure. When you follow a routine preventative maintenance schedule, worn out parts can often be replaced before they negatively impact operating performance.
4. Poor timing – A diesel vehicle’s fuel system depends on proper timing to get fuel transferred to the engine’s internal combustion chamber at just the right moment. When the fuel injection pump’s timing is off, the engine may misfire, use more diesel fuel, or exhibit reduced power.
5. Air in the fuel system – Over time, fuel lines may crack or diesel fuel injection pump seals may break down. When this happens, air gets into the fuel system and negatively impacts engine performance. Stalling or rough running are the most notable side effects of this problem.
6. Electrical issues – The fuel injection pump itself has several electrical components. A faulty relay or damaged wiring harness are some of the most common electrical causes of poor fuel injection pump and engine performance.

Diesel Repair and Maintenance Services in Tempe, AZ

Some diesel fuel injection pump problems can happen simply because of natural wear and tear of components that occurs over time and with use. Other problems happen because of neglect or failure to use the right fuel.

As a diesel owner, it’s important to be aware of common diesel maintenance issues so you can be proactive about your vehicle’s care. Part of that involves following a regular preventative maintenance schedule so that small problems can be caught and resolved before they become bigger, more expensive ones. We also recommend scheduling services and repairs at an auto repair shop that’s qualified to work on diesel vehicles.

At Good Works Auto Repair, we provide expert diesel repair and maintenance services for customers in Tempe, Mesa, Chandler, Gilbert, and throughout the greater Phoenix area. Our technicians are ASE certified and equipped with the best tools and training to service your vehicle accurately and efficiently. Simply give us a call or schedule an appointment online for service today!