Diesel engines power some of the industry’s most important vehicles. From diesel trucks to excavators to utility pumps and forklifts, without proper diesel fuel, diesel-powered vehicles wouldn’t be able to carry out essential tasks. So, how do you know the signs of bad diesel fuel?
And what should you look for to ensure your diesel fuel doesn’t become contaminated or dirty?
Pine Aire Truck here. We’ve been working with trucks for more than 40 years and would love to share what we’ve learned about diesel fuel systems over the years.
In this article, we’ll walk you through some of the top five warning signs that indicate bad diesel fuel, including:
- What causes low-quality fuel
- How to protect your fleet
- Where to get fast, efficient, and comprehensive service for diesel vehicles
5 Common warning signs of bad diesel fuel
| 1. Engine issues: reduced performance, increased engine knocking, and difficulty starting 2. Fuel issues: more fuel consumption, fuel injector issues, and corroded fuel system components 3. Increased exhaust emissions 4. Strange noises coming from the truck 5. Frequent stalls or misfires |
1. Engine problems: reduced performance, increased knocking, and difficulty starting
Low-quality fuel produces low-quality performance. If you notice a significant decrease in engine performance, there’s a strong chance that your vehicle’s engine isn’t working as it should.
The reason could be any of the following:
- Poor acceleration
- Inconsistent power output
- Contaminated or low-grade fuel
If your engine struggles to start, you may also be experiencing issues with your engine.
An engine may struggle to start because of contamination, like water or sediment, that may have entered your fuel supply. If you own a fleet of trucks and notice that the engines of all of your vehicles are struggling, you may experience contaminated fuel.
Let’s take a look at other fuel problems that can affect your truck and diesel equipment.
2. Fuel system problems: more fuel consumption, fuel injector problems, and corroded components
If you notice that your truck is consuming more fuel than normal, your fuel might be dirty. Therefore, your engine may need to consume more fuel to perform at the same level.
Nevertheless, dirty fuel may not be the issue. Fuel injectors may, indeed, be the issue.
When low-quality fuel clogs injectors, the engine suffers. When an engine suffers, corrosion can occur within the engine, injectors, or fuel system.
To remedy fuel system problems, we recommend bringing vehicles in for regular preventive maintenance.
3. Increased exhaust emissions
One way to recognize whether your vehicle’s fuel has gone bad is by looking at your vehicle’s exhaust. If you notice thick, black smoke, you might be experiencing fuel issues.
Increased exhaust emissions mean an increase in pollutants. As such, the carbon monoxide, nitrogen oxides, and particulate matter emitted from exhaust can affect not only your fleet but also the surrounding environment.
More exhaust emissions are a no-go because they harm both human and fleet health.
4. Strange noises from the vehicle
Metal knocking, pinging, sputtering, or popping sounds: they all indicate premature fuel ignition from an engine’s combustion chamber. Diesel fuel that’s dirty or contaminated can cause a series of strange noises that can inflict serious damage on pistons, cylinders, and other mechanical parts.
We always recommend regular maintenance to prevent issues with fuel during the combustion process.
5. Frequent stalling or misfiring
If your engine stalls or misfires often, the fuel supply could be the issue. In fact, frequent stalling and misfiring may signal the presence of free water molecules, sediment, or other contaminants in the fuel or in the bottom of the tank.
If you notice performance issues, frequent engine stalling, or frequent engine misfiring, we recommend checking the fuel quality, fuel additives, and diesel fuel system on your vehicle for impurities or contamination.
Common causes of poor-quality diesel fuel (and fuel contamination)
We explored what can cause dirty fuel in a fuel tank, fuel pump, or fuel filter. But, even more important than the warning signs of dirty fuel are the causes of the initial fuel contamination.
Here are a few common causes for low- or poor-quality diesel fuel:
- Excess dirt and sediment: Dirt, dust, and other contaminants can enter a fuel supply while driving or in storage. These particles can clog fuel filters and damage fuel injectors.
- Excess bacteria: Bacteria, fungi, and other microbes can spread, which can cause contamination. Fuel degradation can occur when water enters the fuel system, as excess water contamination can cause sludge buildup. When sludge builds up, filters clog, and damage can occur.
- Water contamination: Often, the presence of water due to condensation, the climate in a particular storage facility, or improper handling can lead to poor-quality fuel. Fuel degradation results in additional fuel system degradation and/or engine damage.
- Oxidation: Oxidation can cause fuel to become thick and gummy. As a result, degraded fuel can leave behind deposits inside a vehicle’s fuel and engine systems.
One of the best ways to prevent poor-quality fuel from causing internal engine damage, clogged filters, and microbial growth inside truck engine components is by conducting regular truck repairs. A truck repair facility has the tools, diagnostics, technology, and experience to diagnose issues, repair them right the first time around, and prevent the cause of the issue from the get-go.
To ensure clean diesel in your truck, consider reaching out to a professional diesel repair technician.
Did you know?
Did you know that a short, daily pre-trip inspection can help you identify issues in your truck before they become catastrophic in nature? Save yourself stress and time on fuel system repairs.
➡️Check out how John Sganga and Jason Perera, our general manager and shop manager, conduct a preventive pre-trip inspection for their diesel truck on our Instagram page here.👈🏼
How to protect your fleet and keep your diesel fuel clean
So, what’s the best way to prevent the warning signs and causes of poor-quality diesel fuel? At the end of the day, the best way to protect your fleet and keep its diesel fuel clean is by doing the following:
- Ensure that the delivery of your fuel meets or exceeds American Society for Testing and Materials (ASTM) local requirements.
- Conduct regular fuel testing and monitoring in storage tanks to check for the presence of water.
- Opt for high-quality fuel and fuel additives.
- Store diesel in clean, sealed tanks away from sunlight and moisture. Ensure fuel caps and seals are clean.
- Maintain and replace fuel filters often.
- Drain water separators per your truck’s manufacturer’s guidelines.
- Keep fuel tanks full to help reduce the risk of moisture in the air from contaminating the tank.
- Clean and maintain your diesel fuel injectors, as doing so ensures proper fuel combustion.
If you’d prefer the help of a master technician with the above-mentioned items, we’d be happy to help. For more than 40 years, we’ve been conducting top-quality diesel truck repairs on Long Island, NY.
If you’re looking for a top-quality diesel repair technician, look no further. To schedule service for your truck, contact us today.
Pine Aire Truck: We Keep Your Fuel and Fleet Clean So You Can Move Mountains
