Oil pumps play a vital role in the diesel and petrol engines of Chery cars. Firstly, let us understand the basic function and role of the oil pump. The main task of the oil pump is to ensure that the engine is able to obtain a stable supply of fuel during operation. Specifically, the pump ensures an adequate supply of fuel during continuous engine operation by extracting fuel from the tank and transferring it to the fuel supply pipe under pressure. This process is critical to the normal operation of the engine, as only a steady supply of fuel can ensure engine performance and efficiency. For petrol engines, the core function of the fuel pump is to extract petrol from the fuel tank, process it through the pipeline and petrol filter, and finally press it into the float chamber of the carburetor, so as to ensure the stable operation of the engine. During this process, the fuel pump works with the fuel pressure regulator to establish and maintain the proper fuel pressure to ensure a smooth and unobstructed flow of fuel to the engine. In addition, when the engine stops working, the HFM-SFI control module cuts off the power supply to the fuel pump, effectively preventing accidental ignition, thus safeguarding the safety of the vehicle. For diesel engines, although the specific working principle is slightly different from petrol engines, the basic role of the fuel pump is similar. It is also responsible for providing a continuous and stable supply of fuel to ensure that diesel is delivered to all parts of the engine under high pressure to support the normal operation of the engine. In summary, whether it is a petrol engine or a diesel engine, the oil pump plays a vital role in providing a stable and reliable fuel supply to the engine by extracting, pressurising and delivering the fuel, thus ensuring the smooth running of the entire vehicle. This applies to both diesel and petrol engines of Chery Automobile, reflecting the core position and role of the oil pump in the automotive fuel system.
Chery oil pump common problems and solutions mainly include the following aspects:
The oil pump does not work: if the oil pump does not work, first of all, you should check whether the circuit control and wiring are normally energised. If there is no problem with the circuit, you can try to manually rotate the coupling between the motor and the pump to see whether the pump can rotate normally and whether there is a jamming phenomenon.
Oil quality problem: The quality of the oil is also a factor to consider. When the oil is of poor quality, the tank may contain various impurities or foreign objects. Although the oil pump is equipped with a screen to filter gasoline, but this can only effectively block large particles of impurities, small particles of impurities may be sucked into the oil pump motor, long-term will cause damage to the oil pump.
Fuel supply pipe problems: Fuel supply pipe problems should not be ignored, and may be clogged or leaking and other faults. The problem can be solved by cleaning, repairing or replacing the relevant parts.
Plunger non-return problem: If the plunger does not return, it may be due to the plunger being stuck by debris or the spring being broken. You can try to open the glass for repair, if you are sure that the plunger is stuck by debris, you need to remove the oil pump for cleaning; if the spring is broken, then replace a new spring can be.
Repairing the oil pump: Repairing an oil pump usually involves diagnosing the problem, disassembling the pump, inspecting and cleaning it, replacing damaged parts, reassembling it and testing it. Ensure that all replaced parts are original or equivalent quality replacements and test them to ensure that their performance is back to normal before installing them back into the vehicle.
By doing the above, you can effectively solve common Chery fuel pump problems and restore your vehicle's normal performance.
Indications that the oil pump in your Chery vehicle needs to be replaced include weak acceleration and a stuttering sensation when refuelling:
If your vehicle feels underpowered when accelerating, or stutters when accelerating in a hurry, this could be a sign that the fuel pump's performance is declining.
Difficulty starting: If your vehicle takes a long time to start, or if the starter button takes a long time to hold down, this could also be a sign of a oil pump problem.
Rattling noises: If your vehicle hums or makes other strange noises while driving, this could be a sign of a damaged oil pump.
Engine malfunction light comes on: If the engine malfunction light comes on, this could mean that there is a problem with the oil pump or other related components that need to be checked promptly.
Engine shaking: If the engine shakes abnormally during operation, this may be caused by the oil pump's inability to provide stable fuel pressure.
In addition to the above symptoms, you can also judge the health of the oil pump by checking its working sound. Listen with your ears at the petrol filler neck and check whether there is any sound when the oil pump is turning, if there is no sound, there may be a problem with the oil pump. In addition, if you smell petrol or observe that the pump is dark red in colour, it may also indicate that the pump needs to be replaced.
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