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Here are some bad fuel pump indicators demanding a fuel pump replacement:
Whining from the fuel tank can indicate a dying pump. Backfires and sputtering engines can also suggest a broken fuel pump.
In general, any weird sound from your car is never good, so always pay attention.
Note: Any of these sound issues may trigger the check engine light on the dashboard.
There could be a loss of power if your car’s fuel pump can’t provide the engine with sufficient fuel. Also, if the fuel delivery issue is erratic, you might experience surging or sputtering. A less noticeable fuel pump issue can be a decrease in gas mileage.
In any of these cases, you may need a new fuel tank pump.
If the fuel pump can no longer supply the required fuel to the engine, your car will experience starting difficulties. Start-up may take a few seconds longer than usual, or you’ll need a few attempts to get the engine cranked.
Ignore the issue, and eventually, your car simply won’t start. So don’t ignore a fuel pump replacement!
Many things can cause misfiring, including a malfunctioning fuel pump.
If the engine isn’t getting adequate fuel, it won’t have the proper air-fuel ratio in the combustion chamber — leading to inefficient combustion. This results in a misfire.
If the engine is choking or struggling to maintain speed, you may think you’re out of gas. Check the fuel gauge.
If the gauge shows fuel in the tank and yet the car’s choking, you have a failing fuel pump.
A faulty fuel pump can overheat. Due to its inefficiency, it can, in turn, overheat the engine.
If you have an overheating fuel pump issue, the vehicle might run for about 15-30 minutes before halting. After letting your engine cool, it’ll run again only to come to a halt as the issue repeats.
A failing fuel pump can send too much fuel to your engine. This’ll result in the engine surging, which means the vehicle picks up and then drops speed — making driving dangerous.
Test your fuel pressure to spot the cause of a faulty fuel pump.
Is the pressure low? The fuel pump is probably becoming slower or damaged inside — making it incapable of pushing enough fuel to the engine.
You can either buy a fuel pressure gauge to measure the pressure or let a mechanic help you.
Note: Find the recommended fuel pressure in your owner’s manual.
A fuel pump replacement cost can be anywhere between $220-$1,062, depending on your vehicle and its age.
The entire car repair will include a labor cost ($124-$260) and the cost of auto parts ($95-$854).
Here are the answers to some fuel pump-related questions:
A fuel pump is a critical part of your engine fuel line system. It moves fuel from your vehicle’s fuel tank to the carburetor or fuel injector in the engine.
The fuel then combusts, helping you start the car and keep it running.
There are two kinds of fuel pumps depending on how they operate:
Older vehicles with a carburetor will have a mechanical fuel pump with plunger-type or diaphragm pumps. You’ll typically find this kind of pump mounted on the engine block with the engine’s camshaft working the pump.
A mechanical fuel pump uses a pulling force to move gasoline through the different car components. The fuel is controlled with an inlet valve. It closes when fuel in the carburetor’s float bowl is filled and opens when more fuel is required.
A mechanical fuel pump may be more convenient, less costly, and easier to access than other pumps.
You’ll find an electric pump in most modern vehicles with a fuel injection system. This fuel pump doesn’t have a diaphragm or plunger to pull gasoline. Instead, it uses an electric motor to push gasoline through the different components and a pressure regulator to regulate fuel.
An electric pump can be mounted inside the fuel tank on a bracket. You can access the pump from an access port on top of the tank. An electric pump is designed to let it stay submerged in gasoline.
An external electric fuel pump also exists. It sits outside the fuel tank.
If your fuel pump isn’t pumping adequate fuel to keep up with the engine, it may need replacing.
You can do this auto repair yourself. However, we don’t recommend it because dealing with gasoline (highly flammable) must be done by experts.
WARNING: Remember you’re handling gasoline, so:
With all the warnings in mind, let’s check out the fuel pump replacement guide:
Note: Don’t forget to replace an old, clogged fuel filter during the fuel pump repair, so your new pump can operate smoothly.
Here’s how to avoid fuel pump failure and make your pump last longer:
Note: A fuel pump accumulates contamination and experiences wear and tear over time. It’ll start showing signs of damage after 7-8 years or 100,000 miles.
Not sure? Let us diagnose
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