You have almost made it through the warm days of summer with your diesel vehicle. But all of a sudden, it‘s getting harder and harder to start your diesel engine, but yet you dread having to face a diesel repair. Did you know that hot temperatures can present a different set of issues than cold temperatures when it comes to diesel engines. For example, cold temperatures require a different grade of fuel, the glow plugs could accumulate a lot of carbon and go bad, and the oil can become cold and thick.
Why can a diesel engine be hard to start in hot temperatures? The following may be some problems that are causing starting issues:
- Fuel Delivery
- The injector timing may want to be adjusted.
- There could be air in the fuel from leaks in fuel lines.
- The fuel filter may be clogged. This filter should be replaced between every 20K to 40K miles, depending on your driving conditions.
- It may be time to change the fuel pump.
- Fuel Injectors – If you notice a rough idle, loss of power, and white smoke in the exhaust, your fuel injectors might be dirty. Black smoke in the exhaust could indicate a leaking fuel injector.
- Contaminated Fuel – Diesel fuel is an ideal environment for some germs. The warmer the temperatures outside, the faster the germs grow. If you notice a sulfuric odor or green coating in the fuel tank, drain and clean it with a biocide. The fuel lines and injection pump may also want to be treated. The next time you refill the fuel tank; add a little more biocide to prevent germs from forming.
- Sludge deposits – Sludge Deposits from dirty oil have built up in the engine block and lines.
Tip to Remember: Don’t guess what could be the cause of your starting issues, but ask your certified diesel repair mechanic to scan your engine for trouble codes that can help pinpoint the root cause. Many diesel repairs may be simple and inexpensive, such as changing a dirty filter. Other repairs can be expensive and time-consuming, such as replacing injectors.
Wondering what can cause a diesel engine not to start? Call our ASE Certified mechanics at Auto & Fleet Mechanic for more information about diesel repairs and to request an appointment. Our auto repair shop proudly serves residents in Modesto, CA, and the surrounding area.
