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5 Symptoms of Failing Fuel Pumps in Car

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By : Julian Austin    99 or more times read
Submitted 2018-01-18 05:57:21
All modern vehicles that use internal combustion engine come equipped with fuel pumps. The primary function of using fuel pump is to deliver fuel from the gas tank to the engine at the appropriate pressure required to meet performance demands. The fuel pump is activated and pressurised when the key is turned on. Some of the fuel pumps available in the market today are Bosch fuel pumps, Walbro fuel pumps and more. Here is a whittled list of a few symptoms of failing or a bad fuel pump that alerts the driver of a potential issue.

Whining Noise

The first symptom of a failing pump is getting a loud whining sound. This symptom is common in the old fuel pump and an excessively loud whine coming from the fuel tank is usually a sign that there is an issue.

Difficulty in Starting

Another common problem associated with a failing fuel is difficulty starting. A failing fuel pump may still fuel but may experience difficulty starting as a result of the lack of pressure. They also take more cranks to start than normal and require multiple turns of the key before starting.

Decrease in Power and Efficiency

Low pressure developed in the fuel pump disturbs the engines air-fuel ratio and leads to all sorts of performance problems. Besides hard starting, it also leads to misfire decrease in performance, decrease in efficiency, power, and other malfunctions.

Engine Sputtering

One of the best indicators of failing fuel pump is there is a sudden engine sputter, and then your engine resumes regular working. This is caused because the pump is struggling to supply a constant stream of fuel to the engine at the proper pressure.

A Rise in Temperature

Fuel pump emergency can be determined by the temperature of the car. So, you have to pay attention to your temperature gauge and check whether there is a rise in heat. When there is a rise in temperature your car stalls. If your car continuous to stall this means that there is a problem in your fuel pump and it needs a replacement.

Decrease in Gas Mileage

It’s your prime duty to keep track of crawling up your car. All fuel pump comes with a relief valve. In some instances, these valves fail to open, and more fuel than the required level will flow into the engine system resulting in decreased gas mileage. Watch out for this because it could lead to an emergency under the hood.

Engine Will Not Start

The final stage of a failed fuel pump is that the car will no longer start which means there is no fuel to reach the engine upon ignition. Check for a blown fuse and pressure in the fuel line to diagnose this malfunction.

Understanding and identifying all the above symptoms as early as possible is essential to ensure that your Walbro fuel pumps in Australia are in proper working condition.
Author Resource:- The author of this article is the leading supplier of Bosch fuel pumps and accessories in Australia at an affordable price. In this article, he writes about the warnings signs of a failing fuel pump. Visit for more information.
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