What are the reasons for incomplete gasoline combustion and how to solve it?
3 Answers
Gasoline incomplete combustion reasons and solutions are as follows: 1. Long-term low-speed operation of the engine, causing carbon deposits in some parts, and even some parts being clogged with sticky, incompletely burned oil stains, further leading to insufficient combustion and increased fuel consumption. Solution: Go to a professional auto repair shop to clean the engine, transmission, and fuel injectors. 2. Some cars have an exhaust gas recirculation system, which is closed during normal driving. Due to a malfunction, it opens while driving, introducing some exhaust gas back into the cylinder, causing oxygen deficiency in the combustion chamber and incomplete combustion. Solution: Go to a repair shop to fix the exhaust gas recirculation system. 3. The engine has a "misfiring cylinder". Simply put: an engine has 6 combustion cylinders, and if one cylinder is not working or working poorly, it causes incomplete combustion, and the car will also experience noticeable shaking while driving. Solution: Go to an auto repair shop to fix the faulty combustion cylinder. 4. If poor-quality fuel is used regularly, it can also lead to incomplete combustion. Solution: Use higher-quality fuel and avoid mixing two types of gasoline to save money.
I've been repairing cars for many years. Incomplete fuel combustion is commonly caused by an imbalance in the air-fuel mixture ratio, such as insufficient air intake due to a dirty air filter, excessive fuel injection from clogged fuel injectors, or reduced ignition efficiency from spark plug carbon buildup. This can lead to black smoke from the exhaust, a sharp increase in fuel consumption, and reduced power. To fix it, first check and clean or replace the air filter, then use a fuel system cleaner to ensure even fuel injection. Regularly replacing spark plugs is also crucial—switch to the original model once they age. If sensors like the oxygen sensor fail, take it to a 4S shop for computer diagnostics and repair. Using high-quality gasoline to avoid impurity buildup can prevent such issues. Long-term poor engine performance may cause more severe damage, so regular maintenance is key to avoiding costly repairs.
When I first started learning car repair, I also wondered why gasoline doesn't burn completely, making the car lack power and emit smoke! There are many reasons, such as fuel system issues where clogged injectors spray too much fuel, or faulty ignition coils failing to ignite the fuel. I've dealt with it myself—first, DIY cleaning the injectors with commercial cleaners, simple and cost-effective. Check the spark plugs; replace them if there's too much carbon buildup, making sure to choose the correct OEM model. Replacing the air filter ensures sufficient air intake for a balanced air-fuel mixture. If the problem persists, it might be an ECU sensor malfunction—seek a professional mechanic for diagnosis without delay. Avoid using low-quality fuel in daily driving, and refuel when the tank is half empty to reduce carbon buildup. Remember, small issues can turn into major repairs if neglected; addressing them within a week saves hassle.
