{"id":31170,"date":"2022-07-27T01:30:50","date_gmt":"2022-07-26T17:30:50","guid":{"rendered":"https:\/\/carsome.my\/news\/item\/replace-car-fuel-pump"},"modified":"2025-06-30T12:17:34","modified_gmt":"2025-06-30T04:17:34","slug":"replace-car-fuel-pump","status":"publish","type":"post","link":"https:\/\/www.carsome.my\/news\/item\/replace-car-fuel-pump","title":{"rendered":"Signs of a Faulty Car Fuel Pump: Here\u2019s When You Should Replace It"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">The fuel pump in your car plays an important role in the fuel combustion process as it functions to supply fuel to the engine to ensure proper combustion. A faulty fuel pump could cause your car to lose power and accelerate erratically which could lead to an accident. If left unsolved, it could even cause severe damage to other parts of your engine. By knowing what to look out for when diagnosing a faulty fuel pump, you can know when to replace your fuel pump and prevent costly engine damage.<\/span><\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"alignnone wp-image-23998 size-full\" src=\"https:\/\/carsome.my\/news\/wp-content\/uploads\/wp\/shutterstock_384352456.jpg\" alt=\"fuel pump\" width=\"1000\" height=\"750\" srcset=\"https:\/\/www.carsome.my\/news\/wp-content\/uploads\/wp\/shutterstock_384352456.jpg 1000w, https:\/\/www.carsome.my\/news\/wp-content\/uploads\/wp\/shutterstock_384352456-300x225.jpg 300w, https:\/\/www.carsome.my\/news\/wp-content\/uploads\/wp\/shutterstock_384352456-768x576.jpg 768w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/p>\n<h2><span style=\"font-weight: 400;\">What Does a Fuel Pump Do?<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">In most vehicles, the fuel pump is located in the fuel tank, and it\u2019s a vital component that delivers a steady amount of fuel from the tank to the <\/span><span style=\"color: #ff9900;\"><a style=\"color: #ff9900;\" href=\"https:\/\/www.carsome.my\/news\/item\/when-to-overhaul-car-engine\"><span style=\"font-weight: 400;\">engine<\/span><\/a><\/span><span style=\"font-weight: 400;\">. With the help of sensors, fuel pumps in modern vehicles are able to adjust the amount of fuel that is sent to the engine. This ensures that your engine produces enough power when you need it while also being more efficient.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Modern vehicles are equipped with electric fuel pumps while older vehicles have mechanical pumps. In your car, the fuel is pumped from the tank, through the fuel filter, and into the fuel rail, before the injectors spray it into the engine cylinders. Here are the different types of fuel pumps used in cars.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">1. Mechanical Fuel Pump<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Mechanical fuel pumps are found in older cars and have a simpler construction. This type of pump utilizes the energy produced by the engine to move a diaphragm on the exterior of the pump which creates a pressure difference (also called a positive displacement) that pushes the fuel out of the tank. Since most issues with a mechanical fuel pump are related to the diaphragm, they tend to be easier to identify and fix.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">2. Electric Fuel Pump<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">An electric fuel pump is located in the fuel tank and uses an electromagnetic motor to push the fuel to the engine. Compared to a mechanical pump, an electrical one has more components making it more difficult to diagnose and fix. Below are the types of electric fuel pumps commonly used in vehicles.<\/span><b><\/b><\/p>\n<ul>\n<li aria-level=\"2\"><b>In-tank pump:<\/b><span style=\"font-weight: 400;\"> Most modern vehicles use in-tank pumps. Since the pump is located in the fuel tank, it has better protection against shock and extreme temperatures.<\/span><\/li>\n<\/ul>\n<ul>\n<li aria-level=\"2\"><b>Inline pump:<\/b><span style=\"font-weight: 400;\"> This type of pump is located between the fuel tank and engine, either below the car or on the fuel rail in the engine. Since it\u2019s not located in the fuel tank, an inline pump is easier to replace than an in-tank one.<\/span><\/li>\n<\/ul>\n<ul>\n<li aria-level=\"2\"><b>Rotary vane pump:<\/b><span style=\"font-weight: 400;\"> A rotary vane pump works in the same way as a mechanical pump in that it uses positive displacement to deliver the fuel. The pump has a rotor, which is mounted eccentrically (off-center) inside the pump. When the blades rotate in the rotor, fuel is pushed out of the pump.<\/span><\/li>\n<\/ul>\n<p style=\"text-align: center;\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone wp-image-27949 size-full\" src=\"https:\/\/carsome.my\/news\/wp-content\/uploads\/2022\/07\/rotary-vane-pump-operation.gif\" alt=\"rotary vane pump animation\" width=\"478\" height=\"480\" \/><\/p>\n<p style=\"text-align: center;\"><em><span style=\"font-weight: 400;\">How a rotary vane pump works [Source: Giphy]<\/span><\/em><\/p>\n<ul>\n<li aria-level=\"2\"><b>Gerotor pump:<\/b><span style=\"font-weight: 400;\"> A gerotor pump also uses positive displacement principle but has different components. It has two interlocking gears &#8211; an internal drive gear and an external driven gear. As the two gears rotate, they produce a positive displacement at the discharge port which pushes the fuel out.<\/span><\/li>\n<\/ul>\n<p style=\"text-align: center;\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-27948\" src=\"https:\/\/carsome.my\/news\/wp-content\/uploads\/2022\/07\/Gerotor_Pump_Animation.gif\" alt=\"gerotor pump animation\" width=\"288\" height=\"180\" \/><\/p>\n<p style=\"text-align: center;\"><span style=\"font-weight: 400;\">How a gerotor pump works [Source: pumpschool.com]<\/span><\/p>\n<p><b>Read More:<\/b> <span style=\"color: #ff9900;\"><a style=\"color: #ff9900;\" href=\"https:\/\/www.carsome.my\/news\/item\/how-to-choose-a-family-car\"><span style=\"font-weight: 400;\">Top Family Cars in Malaysia<\/span><\/a><\/span><span style=\"font-weight: 400;\">.<\/span><\/p>\n<h2><span style=\"font-weight: 400;\">Signs of a Faulty Fuel Pump<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Although mechanical and electrical fuel pumps have different components, they both produce similar symptoms when they are faulty. If you notice the signs below while driving, it\u2019s time to check your fuel pump as it\u2019s highly likely that your pump may be malfunctioning.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">Loss of Power during Acceleration<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Accelerating, especially from a standstill state, requires a lot of power and generally forces a car\u2019s fuel pump to work harder to deliver more fuel to the engine. If you notice that your car is sluggish when accelerating, it could be a sign that your fuel pump is unable to keep up with the engine\u2019s demand.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">Car Jerking at High Speeds<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">When your fuel pump is unable to supply enough fuel to the engine while driving at high speeds, it causes an imbalance in the fuel-to-air ratio in the engine. This can cause the engine to skip several power strokes, which is when the engine pistons are pushed down in the cylinder as a result of fuel combustion. The power stroke rotates the crankshaft and wheels which then propel the vehicle forward. As a result of the skipped power strokes, <\/span><span style=\"color: #ff9900;\"><a style=\"color: #ff9900;\" href=\"https:\/\/www.carsome.my\/news\/item\/car-jerking-causes\"><span style=\"font-weight: 400;\">your car might jerk<\/span><\/a><\/span><span style=\"font-weight: 400;\"> at high speeds.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">Car Struggling when Climbing up Hills or Carrying Cargo<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Driving up a hill or carrying heavy loads will cause your engine to burn more fuel but if your fuel pump is unable to supply enough fuel, the engine won\u2019t be able to produce enough power. If left unchecked, this could cause your car to stall putting you in a dangerous situation.<\/span><\/p>\n<p><b>Read More:<\/b> <span style=\"color: #ff9900;\"><a style=\"color: #ff9900;\" href=\"https:\/\/www.carsome.my\/news\/item\/signs-of-faulty-car-gearbox\"><span style=\"font-weight: 400;\">Signs of a Faulty Gearbox<\/span><\/a><\/span><\/p>\n<h3><span style=\"font-weight: 400;\">Your Car Is Unable to Start<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Your engine requires fuel even during start-up, so if you can\u2019t start your car, it could have a faulty fuel pump. To confirm if this problem is caused by the fuel pump, you can check the pressure in the fuel line with a fuel pressure gauge.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">If the reading is zero, your fuel pump is most likely not working. Other than a faulty fuel pump, issues with the spark plugs, <\/span><span style=\"color: #ff9900;\"><a style=\"color: #ff9900;\" href=\"https:\/\/www.carsome.my\/news\/item\/what-you-need-to-know-about-car-batteries\"><span style=\"font-weight: 400;\">battery<\/span><\/a><\/span><span style=\"font-weight: 400;\">, <\/span><span style=\"color: #ff9900;\"><a style=\"color: #ff9900;\" href=\"https:\/\/www.carsome.my\/news\/item\/car-alternator\"><span style=\"font-weight: 400;\">alternator<\/span><\/a><\/span><span style=\"font-weight: 400;\">, or fuse box could also prevent your car from starting up, so it\u2019s worth getting a professional mechanic to do a proper inspection.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">Sudden Increase or Decrease in Engine Speed (Surging)<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Surging happens when your engine speed suddenly goes up or down even when you hold the pedal down steadily. A faulty fuel pump can cause an engine surge when it doesn\u2019t maintain consistent pressure in the fuel line. If you notice surging in your engine, it\u2019s a sign that the fuel pump is unable to produce enough pressure consistently.<\/span><\/p>\n<h2><span style=\"font-weight: 400;\">Signs of a Faulty Fuel Pump Relay<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">A fuel pump relay is usually located in the fuse box in the engine bay. It functions as the switch that controls the power supplied to the fuel pump. If the relay is faulty, your fuel pump might not be getting the power it needs and therefore will not function as it should.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">Difficulty Starting Your Engine<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">A faulty fuel pump relay can cause the pump to stop sending fuel to the engine. When that happens, you may not be able to start your engine. However, as mentioned above, issues with starting your car can be caused by other problems, so it\u2019s best to have a professional check your car.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">Engine Performance Issues\u00a0<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">The fuel pump relay may stop functioning all at once or gradually. If the relay fails slowly, you might notice your engine performance drop gradually or occasionally. This can cause your engine to stall on occasion.<\/span><\/p>\n<p><b>Read More:<\/b> <span style=\"color: #ff9900;\"><a style=\"color: #ff9900;\" href=\"https:\/\/www.carsome.my\/news\/item\/top-car-upgrades\"><span style=\"font-weight: 400;\">Car Upgrades You Can Get to Improve Your Ride<\/span><\/a><\/span><\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-26857\" src=\"https:\/\/carsome.my\/news\/wp-content\/uploads\/wp\/GettyImages-1364141865.jpg\" alt=\"carsome petrol refuel\" width=\"2121\" height=\"1414\" srcset=\"https:\/\/www.carsome.my\/news\/wp-content\/uploads\/wp\/GettyImages-1364141865.jpg 2121w, https:\/\/www.carsome.my\/news\/wp-content\/uploads\/wp\/GettyImages-1364141865-300x200.jpg 300w, https:\/\/www.carsome.my\/news\/wp-content\/uploads\/wp\/GettyImages-1364141865-768x512.jpg 768w, https:\/\/www.carsome.my\/news\/wp-content\/uploads\/wp\/GettyImages-1364141865-1024x683.jpg 1024w\" sizes=\"(max-width: 2121px) 100vw, 2121px\" \/><\/p>\n<h2><span style=\"font-weight: 400;\">Useful Things to Know About Your Car Fuel Pump<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Besides knowing the signs of a faulty fuel pump, you should also understand how to maintain it and when to replace it. These tips can help you prolong the life of your fuel pump and help you be prepared for unexpected issues with your pump.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">When Should You Replace Your Fuel Pump?<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Like other vehicle components, a fuel pump goes through regular wear and tear. That being said, it can generally last over 150,000 kilometers before showing signs of wear.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">How to Maintain Your Car Fuel Pump?<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">There are a couple of things you can do to prolong the life of your fuel pump, including:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Replacing the fuel filter according to the manufacturer\u2019s recommendations:<\/b><span style=\"font-weight: 400;\"> A dirty or clogged fuel filter creates extra pressure in the fuel line. This increased pressure can strain the pump and speed up wear and tear.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Fill up your tank with enough fuel:<\/b><span style=\"font-weight: 400;\"> Since most fuel pumps are in-tank pumps, they rely on the fuel to keep them cool. If you leave your fuel on low for too long, it could cause your fuel pump to heat up and become damaged.<\/span><\/li>\n<\/ul>\n<h3><span style=\"font-weight: 400;\">How Much Does It Cost to Replace a Fuel Pump?<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">A fuel pump is a relatively affordable component to replace ranging in price from RM50 to well above RM300. For instance, a fuel pump for older cars such as a <\/span><span style=\"color: #ff9900;\"><a style=\"color: #ff9900;\" href=\"https:\/\/www.carsome.my\/buy-car\/proton\"><span style=\"font-weight: 400;\">Proton<\/span><\/a><\/span><span style=\"font-weight: 400;\"> Wira or Waja could start from RM50, while a <\/span><span style=\"color: #ff9900;\"><a style=\"color: #ff9900;\" href=\"https:\/\/www.carsome.my\/buy-car\/perodua\/myvi\"><span style=\"font-weight: 400;\">Perodua Myvi<\/span><\/a><\/span><span style=\"font-weight: 400;\"> fuel pump typically costs RM150 and above. However, the price varies depending on the model and year of the car, as well as the brand of the pump.<\/span><\/p>\n<h2><span style=\"font-weight: 400;\">Choose CARSOME Certified for Complete Peace of Mind<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">If you\u2019re looking for a quality pre-owned car, look no further than <\/span><span style=\"color: #ff9900;\"><a style=\"color: #ff9900;\" href=\"https:\/\/www.carsome.my\/buy-car\"><span style=\"font-weight: 400;\">CARSOME<\/span><\/a><\/span><span style=\"font-weight: 400;\">. We put all our cars through a stringent 175-point inspection and professional refurbishment process to ensure they have safety beyond standards, complete comfort, and refurbished aesthetics.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Additionally, each <\/span><span style=\"color: #ff9900;\"><a style=\"color: #ff9900;\" href=\"https:\/\/www.carsome.my\/news\/item\/carsome-certified-standard\"><span style=\"font-weight: 400;\">CARSOME Certified<\/span><\/a><\/span><span style=\"font-weight: 400;\"> car offers excellent value with the following promises.<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Fixed price:<\/b><span style=\"font-weight: 400;\"> The listing price you see on CARSOME is the actual full price of the car with no hidden fees, so you know exactly how much you\u2019re paying.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Five-day money-back guarantee:<\/b><span style=\"font-weight: 400;\"> If you buy a car from CARSOME and are not happy with it, You can return it within five days and get a full refund. No questions asked!<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>One-year warranty:<\/b><span style=\"font-weight: 400;\"> All CARSOME Certified cars also have a one-year extended warranty for your peace of mind.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Check out <\/span><span style=\"color: #ff9900;\"><a style=\"color: #ff9900;\" href=\"https:\/\/www.carsome.my\/buy-car\"><span style=\"font-weight: 400;\">CARSOME<\/span><\/a><\/span><span style=\"font-weight: 400;\"> to find your dream car today!<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Check out these signs of a faulty fuel pump so you can replace it before it leads to more serious engine problems.<\/p>\n","protected":false},"author":39,"featured_media":23998,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[117],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>When to Replace Your Car Fuel Pump &amp; Signs That It\u2019s Faulty<\/title>\n<meta name=\"description\" content=\"A faulty car fuel pump can cause your car to lose power and damage other engine parts. 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