How to Deal with Black Smoke and Lack of Power in Jiangling Yuhu?
4 Answers
Jiangling Yuhu emitting black smoke and experiencing lack of power requires checking the fuel injection pump, fuel injectors, turbocharger, exhaust gas recirculation, and whether the air filter is clogged. Below are the specific reasons for the lack of power in Jiangling Yuhu: 1. Carbon buildup inside the engine: When there is excessive carbon buildup inside the engine, the gasoline sprayed by the cold-start injector will be largely absorbed by the carbon deposits, resulting in an overly lean air-fuel mixture during cold starts, making it difficult to start. 2. Ignition system: Issues with the ignition system. Check the condition of the spark plugs, high-voltage wires, and ignition coils. Poor performance of the ignition system or improper spark plug firing can also cause such symptoms. Check if the spark plugs have excessive carbon buildup and replace them if necessary. 3. Unstable oil pressure: Abnormal fuel pump pressure or incorrect readings and poor performance of the intake pressure sensor can cause vehicle shaking. Check the oil pressure and replace components if necessary.
I've been repairing cars for several years and have encountered several Jiangling Yuhu models emitting black smoke with poor acceleration. Usually, the first step is to check if the air filter is clogged with dust—clean it or replace it with a new one. The fuel injectors might have excessive carbon buildup; cleaning them can improve uneven fuel supply. Also, check the engine oil level to ensure it's appropriate, as too much or dirty oil can affect lubrication. Replace old spark plugs to avoid misfiring, which can cause black smoke. It's best to visit a repair shop to check for fault codes, as the issue might be caused by sensor misjudgment leading to excessive fuel injection, commonly seen with faulty oxygen sensors. Regular engine maintenance is crucial—avoid using low-quality fuel and minimize prolonged idling to reduce carbon buildup. If the car struggles to accelerate, avoid forcing it to drive, as prolonged use can cause more damage. Addressing this issue promptly can save significant costs, so seek professional inspection as soon as possible.
Last year, my own Domain Tiger had severe black smoke and accelerated as slow as a snail. At first, I thought it was due to the weather, but after inspection, I found the air filter was dirty and black. Replacing the air filter improved it a bit but didn’t completely fix the issue. Cleaning the fuel injectors also didn’t help much. Later, I changed the spark plugs, but after a few days of testing, the problem remained the same. I had to take it to a repair shop, where they detected unstable fuel pressure. After fixing the fuel pump, it finally ran normally. I always refuel at regular stations to avoid poor fuel quality causing combustion issues. Lack of acceleration could be due to a turbo or loose belt—don’t delay like I did, wasting time and money. I suggest you check it early and clean the intake system regularly to solve minor issues before they escalate.
Vehicle maintenance is crucial, and I often help friends with such issues. Black smoke and weak acceleration are often caused by clogged air intake or blocked fuel lines; checking the air filter, cleaning accumulated dust, and replacing parts can solve the problem. Regularly clean the fuel injectors to avoid carbon buildup, and replace spark plugs every 20,000 kilometers to ensure strong ignition. Poor fuel quality can also lead to incomplete combustion due to excessive fuel—use additives to remove deposits in the fuel lines. Weak acceleration might indicate engine overheating, so watch for abnormal coolant temperature readings. I’ve developed a habit of checking engine oil and belt tension weekly—minor fixes save trouble. Detect fault codes early with diagnostic tools, and never ignore warning lights. Safe driving relies on meticulous maintenance.
