5.9 Cummins Excessive Black Smoke

There are various reasons why your 5.9L Cummins-powered vehicle might pump out black exhaust smoke. At Hot Shot’s Secret, we formulate advanced solutions for common vehicle concerns like these. Our robust products solve your black smoke challenges, preventing high fuel consumption, smoke emissions and system damage.

Reliability and durability make 5.9L Cummins engines popular, but they may encounter various issues that cause black smoke.

Dirty or Clogged Air Filter

If your truck stops and starts, struggles to accelerate or pumps tons of black smoke when you speed up, you may have an airflow problem. Dust in your engine’s air filter can stop air from reaching its cylinder, burning more fuel and saturating the fuel-air mixture. Beyond dense smoke, a clogged filter may lead to odd engine noises, a strong fuel smell when starting and lower fuel economy.

Check your air filter. If it’s clogged or dirty, replacing it may eliminate the excessive black smoke issue.

Fuel Injector Problems

Noticing dark smoke when you idle or place your engine under load can indicate fuel injector issues. Clogged injectors can stop air-fuel combustion, creating carbon from unburnt fuel, which your car ejects as black smoke. Leaking injectors can also cause extra fuel to drip from the injector, changing the fuel-to-air ratio in the combustion chamber.

Clean injectors with an additive such as Diesel Extreme to unclog blockages. If necessary, replace faulty injectors. Consider using Everyday Diesel Treatment (EDT) for regular upkeep.

Turbocharger Malfunction

Symptoms of faulty turbochargers include power loss, slow acceleration or throttle responsiveness and poor fuel consumption. If you notice these signs, together with too much black smoke when your engine is under load, you may have a damaged turbocharger. Malfunctioning turbochargers can’t drive air into engine cylinders, leaving too much fuel during combustion.

If you can, cleaning your turbocharger is the best fix. You can also take your car to a professional mechanic, who will inspect your engine thoroughly and replace relevant parts.

Faulty EGR System

Your exhaust gas recirculation (EGR) valve redirects emission to your engine’s combustion chamber. When it clogs, your engine cannot move emissions effectively, causing black smoke and loss of power.

Clean all valve passages of soot buildup and blockages. If necessary, replace the EGR valve. 

You can diagnose the cause of too much black smoke by:

• Conducting a visual inspection: Check parts like EGR valves, air filters, injectors and turbochargers for damage, leaks and blockages.
• Running OBD-II Diagnostics: Use an OBD-II car scanner to identify errors in fuel injection, airflow and turbocharger performance.
• Test fuel pressure: Use a pressure gauge and flow testing to check fuel pressure and injector performance.

Maintenance is key to keeping your 5.9L Cummins running for a long time and optimizing performance. High-quality products can enhance your engine’s longevity and functionality. Give your engine consistent care with:

• Regular preventive maintenance, including air and fuel filter replacements, and following manufacturer recommendations. Consistent part cleaning is also important for components like injectors, turbochargers and valves.
• High-quality fuel to reduce injector and filter clogging. Using better fuel and additives such as Everyday Diesel Treatment with each full tank can help you prevent future issues.
• Turbocharger care, including inspections, cleaning and parts replacements. Regular tuneups keep your truck running optimally and catch minor issues before they require more expensive fixes.

At Hot Shot’s Secret, we manufacture premium-quality engine care solutions. With us, you can maintain a purring, efficient system. Address several common causes of black smoke with these products.

Diesel Extreme

Diesel Extreme is a robust, concentrated formula for unclogging fuel injectors. It cleans your injectors of internal diesel deposits like polymeric or waxy coatings, enhancing fuel combustion. This solution uses quality cetane boosters, fuel stabilizers and lubricity enhancers to deep clean your fuel system. Pour it into your tank and clear your engine for uninterrupted driving.

Everyday Diesel Treatment (EDT)

Everyday Diesel Treatment is another exceptional formula that can reduce black smoke. Charged with our LX4 Lubricity Extreme and cetane boosters, EDT improves combustion, performance, fuel consumption and engine power. It cleans injectors and prevents clogging for enhanced efficiency and spray patterns. Add EDT to your tank with every fuel refill for continuous care.