What to Do When the Great Wall Fengjun 5 Has Slow Acceleration Response?

[VonHayden]

The solutions for slow acceleration response in the Great Wall Fengjun 5 are as follows: 1. Intake System: The air supply system mainly provides an appropriate amount of air to match the fuel, and the purity of the supplied air affects combustion efficiency, indirectly impacting power delivery. When experiencing sluggish acceleration, the first step is to check if the intake system is intact. If it is intact, consider whether the intake system needs cleaning. Remove the air filter and blow off the dust; if it's difficult to clean, replace it. Check if the throttle body is clean, and further inspect the intake valve and intake manifold. 2. Fuel Supply System: The amount of fuel supplied directly determines the strength of the power, and complete combustion of the fuel is essential for consistent power. When experiencing insufficient power, the fuel supply system should be examined. First, ensure the fuel meets the vehicle's standards. If the fuel lines and connections are intact, inspect the fuel filter, fuel injectors, and fuel pump for any blockages in fuel delivery, cleaning or replacing them if necessary. 3. Electronic Control Components: Sensors installed at various monitoring points send data to the ECU, which processes and analyzes the data according to pre-set programs, issuing appropriate commands to actuators. This ensures the vehicle operates as intended by the driver. If both the intake and fuel supply systems are functioning normally but acceleration remains sluggish, the issue likely lies in the electronic control system.

[DeEmma]

My Fengjun 5 also had a fuel delivery delay issue before, and later found it was caused by the fuel system and intake system. Let's talk about the fuel system first. It might be a clogged fuel filter, which is located near the fuel tank. If not replaced for too long, it can obstruct the fuel pump's supply. Carbon buildup in the fuel injectors is also crucial, especially for vehicles often driven in urban areas, causing uneven fuel injection with each throttle press. The air filter is an easily overlooked component, visible when you lift the hood. Too much dust can restrict airflow, making the engine work like it's holding its breath. I also checked the spark plugs and found one with severe electrode erosion. After replacing them with NGK platinum ones, the ignition efficiency was restored. Remember to turn off the engine before inspection to avoid burns.

[VonIsabel]

Friends who drive pickup trucks all understand the characteristics of workhorses like the Fengjun 5. A sluggish throttle is mostly due to inadequate maintenance. Every time I service my vehicle, I make sure to check the air filter and throttle body. The layer of sludge behind the throttle body is the most troublesome—it requires a specialized cleaner to remove properly. If the fuel injectors have poor atomization, the engine might slightly shake when you step on the gas. If you're cleaning these yourself, remember to disconnect the power. A new set of spark plugs can last up to 50,000 kilometers—just use matching models from NGK or Bosch. Fuel quality is also crucial; long-term use of gas from small, unreliable stations can lead to gum deposits in the fuel tank, eventually clogging the fuel pump filter. Always keep an eye on the dashboard for any illuminated engine warning lights.

[BlakelyLynn]

To address sluggish acceleration, a systematic inspection is required, focusing on three key areas: fuel supply, ignition, and intake. For fuel supply issues, check the fuel pump pressure and fuel filter. In the ignition system, inspect whether the spark plug gap exceeds 0.8mm and measure the ignition coil resistance. Regarding the intake system, air leaks often occur at the edges of the air filter housing, especially in older vehicles with deteriorated rubber seals. ECU receiving abnormal throttle position signals can also cause sluggishness - use a diagnostic tool to check for delayed throttle opening in the data stream. Vehicles with modified intake/exhaust systems should pay special attention to whether the mass airflow sensor is properly matched. Repair shops typically follow a step-by-step testing approach from simple to complex for such issues.