Your car won’t start without a fuel pump, so it’s extremely important that the pump is always functioning optimally. The car’s fuel is stored in the fuel tank. The pump is immersed in the fuel, which it sends through pipes to the car’s engine, passing through at least two fuel filters along the way.
In this article, we’ll discuss the importance of the fuel pump in the Mitsubishi Pajero, the problems that can occur with it, the symptoms of malfunction, preventive measures you can take to keep the fuel pump in good working condition, and how much it costs to replace it when necessary.
It’s not crucial to know, but it might help you. There are two types of fuel pumps on the market: electronic pumps and mechanical pumps. They are very different in construction and operation, but when they fail, the car will exhibit similar symptoms.
What Is the Role of a Fuel Pump?
As mentioned above, its role is vital because without it, the car won’t start. It transports the necessary fuel to create the mixture that burns in the engine, from the car’s tank to the fuel rail. Without the pump, the car won’t start, and if the pump is faulty, the car will run poorly.
What Are the Signs That the Fuel Pump Has Problems in an Mitsubishi Pajero?
We’ll talk about the symptoms your car shows before the fuel pump fails. Once it fails, the car won’t start, so we’re interested in the signs it gives before it completely breaks down. It’s good to have this information to prevent repairs that will cost you much more:
- The Mitsubishi Pajero becomes increasingly difficult to start. If the fuel filter is clogged or the fuel flow from the pump is less than it should be, your car will struggle to start. Eventually, it won’t start at all. Make sure all filters are changed on time. If they are changed and the car still starts hard, consider a faulty fuel pump.
- Strange noises while driving but especially when trying to start the car.
- The car loses power when you accelerate. Compared to when the car used to accelerate smoothly, now it jerks or even seems to have no power under load. This is normal if the fuel pump can no longer send the fuel flow that pressing the pedal to 100% requires.
- The engine of the Mitsubishi Pajero shakes violently both at idle and under load. You might be used to slight shaking in the first minutes in the morning, but doing so while driving is not normal. The injectors no longer work properly because the pump doesn’t send fuel as it should. The injectors are directly responsible for the smooth running of the engine. When we have large corrections on an injector, the engine will start to knock and shake, even sounding very bad.
- If you’ve changed the car’s filter and it still shakes, consider a new fuel pump.
If your car shows the above symptoms, you’ve easily found the problem. The fuel pump needs to be replaced.
Why Does the Fuel Pump Fail in the Mitsubishi Pajero?
Consider that the fuel pump is immersed in fuel. Poor-quality fuel will clog filters and damage the pump. Be careful where you refuel, and if you’re buying a diesel car, make sure the previous owner used quality diesel. You can do this by checking the injectors’ corrections and looking at the amount of black smoke the car emits.
Change the fuel filter every 60,000 km. Other reasons why the fuel pump may fail in the Mitsubishi Pajero include always driving with too little fuel in the tank. The fuel directly cools the pump, and in the summer, the pump can burn out if you always drive with 5 liters in the tank. Moreover, if you always drive with little fuel, the pump will constantly draw residues from the bottom, and new residues will form because the tank will rust inside if it’s not kept full of fuel. Ideally, you should always have more than half a tank.
The coarse filter can be a problem, the supply and return hoses can be clogged, or the bypass valve may be defective. All these issues can create the above symptoms.
When Should You Replace the Fuel Pump in the Mitsubishi Pajero?
The pump needs to be replaced if, after changing all the filters, the car still has the above symptoms. Also, check the injectors; if they are full of sludge, dirty, and clogged, it’s clear that the pump needs to be replaced and the fuel tank cleaned.
Prevention can help you maintain the car for as long as possible. Always use quality fuel from well-known gas stations, use cleaning additives from time to time, and change all filters on time.
Avoid running out of fuel, and don’t always drive with the fuel light on. The car will suffer. Fill up the tank, and when you reach half, you can top it up again to always have more than half a tank.
How Much Does It Cost to Replace the Fuel Pump in the Mitsubishi Pajero?
Somewhere between 700 and 1,000 lei, including labor. If you’re not a mechanic, you can’t do this at home. Since you’re replacing the fuel pump, clean the tank as well—you’ll be surprised to see what’s inside it.
