{"id":86267,"date":"2023-06-30T04:56:27","date_gmt":"2023-06-30T11:56:27","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=86267"},"modified":"2023-10-19T06:53:49","modified_gmt":"2023-10-19T13:53:49","slug":"what-you-need-to-know-about-modern-fuel-systems","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/what-you-need-to-know-about-modern-fuel-systems\/","title":{"rendered":"What You Need To Know About Modern Fuel Systems"},"content":{"rendered":"<!DOCTYPE html PUBLIC \"-\/\/W3C\/\/DTD HTML 4.0 Transitional\/\/EN\" \"http:\/\/www.w3.org\/TR\/REC-html40\/loose.dtd\">\n<html><body><span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading Time: <\/span> <span class=\"rt-time\"> 5<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span><style>.kadence-column_1c7eb5-45 > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_1c7eb5-45 > .kt-inside-inner-col,.kadence-column_1c7eb5-45 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column_1c7eb5-45 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_1c7eb5-45 > .kt-inside-inner-col{flex-direction:column;}.kadence-column_1c7eb5-45 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_1c7eb5-45 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_1c7eb5-45{position:relative;}@media all and (max-width: 1024px){.kadence-column_1c7eb5-45 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_1c7eb5-45 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_1c7eb5-45 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-3c23a8  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-7748b5\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading_5b28d0-b4, .wp-block-kadence-advancedheading.kt-adv-heading_5b28d0-b4[data-kb-block=\"kb-adv-heading_5b28d0-b4\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading_5b28d0-b4 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading_5b28d0-b4[data-kb-block=\"kb-adv-heading_5b28d0-b4\"] mark.kt-highlight{font-family:Inter;font-weight:500;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading_5b28d0-b4 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading_5b28d0-b4[data-kb-block=\"kb-adv-heading_5b28d0-b4\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading_5b28d0-b4 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading_5b28d0-b4\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>The fuel system includes various parts like the gas tank, fuel pump, fuel lines, fuel filter, and fuel injectors.<\/li><li>The fuel injection system replaced the carburetor, and it comes in mechanical and electronic types.<\/li><li>Keep the fuel system in good shape by regularly checking and replacing the fuel filter, cleaning the throttle body and fuel injection system, and keeping fuel levels above 25% percent of the fuel tank&rsquo;s capacity.<\/li><\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>Your vehicle&rsquo;s fuel system is a modern marvel tucked neatly under the hood. It takes care of everything from pumping fuel down the lines to injecting it into your engine&rsquo;s cylinders. Most modern vehicles use a fuel injection system. If you&rsquo;ve ever wondered &ldquo;How does gas work in a car?&rdquo; you&rsquo;ll find the answer in this article.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How Do Modern Fuel Systems Work?<\/h2>\n\n\n\n<p>The modern fuel system is a series of many different moving and static parts in your vehicle. These parts move fuel and transform it into a usable state for your engine.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Gas Tank<\/h3>\n\n\n\n<p>It all starts when you fill up your tank at the gas station. The <a href=\"https:\/\/www.carparts.com\/fuel-tank\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"tank\">tank<\/a> is where your vehicle stores excess fuel before use. It&rsquo;s typically made from corrosion-resistant steel or polyethylene plastic. All fuel tanks incorporate an inlet or filler tube for the fuel to enter the tank, a pressure-holding filler cap with relief features, and a fuel pump mounted in the tank.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Fuel Pump<\/h3>\n\n\n\n<p>Once there&rsquo;s gas in the tank, the <a href=\"https:\/\/www.carparts.com\/fuel-pump\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"fuel pump\">fuel pump<\/a> takes over. Most vehicles use either an impeller or turbine pump driven by a small electric motor. The fuel pump pressurizes the fuel before it&rsquo;s pushed through the lines and towards the engine. When the fuel is pressurized, it has a higher boiling point, which prevents vapor from forming and interrupting the fuel&rsquo;s flow.<\/p>\n\n\n\n<p>Certain vehicles have multiple gas tanks and fuel pumps to ensure that the gas gets to the engine even when the vehicle is running on uneven or extreme terrain. Even if the fuel sloshes around, one of the pumps should be able to still maintain a steady flow of fuel in the system.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/06\/automotive-fuel-system-1024x683.jpg\" alt=\"automotive fuel system and injectors\" class=\"wp-image-86328\" width=\"1024\" height=\"683\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/06\/automotive-fuel-system-1024x683.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/06\/automotive-fuel-system-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/06\/automotive-fuel-system-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/06\/automotive-fuel-system-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/06\/automotive-fuel-system-1200x800.jpg 1200w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/06\/automotive-fuel-system-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/06\/automotive-fuel-system.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>Fuel injection proved more efficient and accurate at tempering the air-fuel ratios in different vehicles, so carbureted vehicles were no longer produced by the 1980s.<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Fuel Lines<\/h3>\n\n\n\n<p><a href=\"https:\/\/www.carparts.com\/fuel-line\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Fuel lines\">Fuel lines<\/a> are an important part of the fuel system and the next step for the gas after it&rsquo;s dispensed by the fuel pump. The lines are made of different materials depending on what they&rsquo;re being used for. Rigid lines are the parts fastened to the vehicle&rsquo;s body, frame, or engine. These parts of the line are made of seamless steel or nylon-reinforced plastic tubing. On the other hand, the rubber hose parts of the line are made of synthetic rubber and are used where flexibility is needed.<\/p>\n\n\n\n<p><br>The fuel lines need to be kept in good condition since they need to contain the pressurized gas of the fuel injection system as it&rsquo;s being transferred. This pressure can reach up to 60 PSI for multiport fuel-injection systems.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Fuel Filter<\/h3>\n\n\n\n<p>It&rsquo;s common for there to be impurities in fuel despite all the refining it&rsquo;s put through. That&rsquo;s why it&rsquo;s essential for the fuel to pass through the <a href=\"https:\/\/www.carparts.com\/fuel-filter\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"fuel filter\">fuel filter<\/a> before it enters the engine. Depending on your vehicle, the fuel filter is either integrated into the fuel pump or separate and connected to the pump via the fuel lines.<\/p>\n\n\n\n<p>In a lot of vehicles, there&rsquo;s at least a strainer-type filter in the tank and another one between the tank and the engine. The fuel filter or strainer in the tank filters a lot less than the one upstream.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>In a lot of vehicles, there is at least a strainer type filter in the tank and another one between the tank and the engine. The fuel filter or strainer in the tank filters a lot less than the one upstream.<\/p><cite>&ndash;<a href=\"https:\/\/www.carparts.com\/blog\/author\/anthonyharlin\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Anthony Harlin, ASE Certified Master Automobile Technician\">Anthony Harlin, ASE Certified Master Automobile Technician<\/a><\/cite><\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\">Fuel Injectors<\/h3>\n\n\n\n<p>Once the fuel passes through the fuel filter and the fuel lines, it goes on to the engine. In a modern vehicle, the <a href=\"https:\/\/www.carparts.com\/fuel-injector\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"fuel injectors\">fuel injectors<\/a> handle this. A pipe called the fuel rail channels the pressurized fuel into the injectors. After that, the fuel injectors spray the fuel through a small nozzle into the engine&rsquo;s intake valves. The nozzle atomizes the fuel into a fine mist that burns easily in the engine.<\/p>\n\n\n\n<div id=\"article-search-widget\">\n<div class=\"cp-search\">\n<div align=\"center\">\n<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/w_auto,dpr_auto\/carparts\/logos\/badge_wordmark\/full_color\/CP_LOGO_COLOUR_RGB\" alt=\"CarParts.com\" width=\"300\" height=\"56\">\n<\/div>\n<form id=\"cpsearchform\" name=\"cpsearchform\" action=\"https:\/\/www.carparts.com\/search\" method=\"get\" target=\"_blank\" accept-charset=\"character_set\" aria-label=\"search CarParts.com\">\n    <input type=\"text\" class=\"keyword\" name=\"q\" placeholder=\"Search for parts on CarParts.com\" value=\"\" aria-label=\"Search CarParts.com\"><input type=\"submit\" class=\"btn-search\" value=\"Search\" aria-label=\"Search\">\n<\/form>\n<\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">The Modern Fuel Injection System<\/h2>\n\n\n\n<p>The fuel injection system replaced the carburetor. Both are designed to control the amount of air and fuel in the engine to achieve a stable ratio as it runs. A carburetor allows the air flowing through its system to deliver fuel to the engine. It controls the air-fuel ratio using a venturi, which dispenses the fuel in proportion to the amount of air entering the intake. However, fuel injection proved more efficient and accurate at tempering the air-fuel ratios in different vehicles, and carbureted vehicles were no longer produced by the 1980s.<\/p>\n\n\n\n<p>There are two different types of fuel injection: mechanical fuel injection and electronic fuel injection.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Mechanical Fuel Injection<\/h3>\n\n\n\n<p>Mechanical fuel injection came first. This was the first version of fuel injection on the market, and in the late 1960s, it was the only choice for vehicle owners who wanted something other than a carburetor. Like a carburetor, a mechanical fuel injector measured and dispensed fuel to the engine. It used a complex camshaft that moved according to the vehicle&rsquo;s <a href=\"https:\/\/www.carparts.com\/blog\/what-does-car-rpm-stand-for\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"revolutions per minute\">revolutions per minute<\/a> (RPM). Driven by centrifugal force, the camshaft also rotated along with a press on the gas pedal. The pump&rsquo;s plungers would be rotated by a toothed rack controlled by a follower on the camshaft, which altered the amount of fuel the pump delivered to the engine. Other mechanical components would alter the follower&rsquo;s path based on things like coolant temperature and barometric pressure.<\/p>\n\n\n\n<p>Today, a vast majority of mechanical fuel injection systems are only used by drag racers. These systems require a lot of attention and maintenance, and most casual vehicle owners don&rsquo;t require the increased performance this constant-flow system provides.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Electronic Fuel Injection<\/h3>\n\n\n\n<p>Most modern cars today use electronic fuel injection. It&rsquo;s run entirely by the powertrain control module (PCM). To start, the PCM takes readings from different sensors scattered throughout the system. These sensors include knock sensors, inlet air-temperature sensors, and oxygen sensors. Once the PCM knows the engine conditions, it&rsquo;s able to calculate the exact amount of fuel to dispense to the engine to maintain the <a href=\"https:\/\/www.carparts.com\/blog\/what-is-a-good-air-fuel-ratio-chart-included\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"correct air-fuel ratio\">correct air-fuel ratio<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Recommended Maintenance<\/h2>\n\n\n\n<p>There&rsquo;s no question that your vehicle&rsquo;s fuel system is a modern marvel. However, even with an electronic fuel injection system under your hood, there are still a few things you should do for maintenance.<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><a href=\"https:\/\/www.carparts.com\/blog\/here-are-the-top-4-signs-of-a-bad-fuel-filter\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Check your fuel filter\">Check your fuel filter<\/a> regularly and <a href=\"https:\/\/www.carparts.com\/blog\/how-to-replace-a-fuel-filter\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"replace\">replace<\/a> it annually or every 12,000 to 15,000 miles.<\/li><li>Hire a licensed mechanic to clean your vehicle&rsquo;s throttle body and fuel injection system every 20,000 to 30,000 miles.<\/li><li>Try not to let your fuel level fall below 1\/4th of a tank.<\/li><\/ul>\n<\/body><\/html>\n","protected":false},"excerpt":{"rendered":"<p><span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading Time: <\/span> <span class=\"rt-time\"> 5<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>Your vehicle&rsquo;s fuel system is a modern marvel tucked neatly under the hood. It takes care of everything from pumping&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/what-you-need-to-know-about-modern-fuel-systems\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":86327,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[52,3747],"tags":[1199,1185,1209,1197,1198],"ppma_author":[2607,3742],"class_list":{"0":"post-86267","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-diy","8":"category-engine","9":"tag-fuel-filter-2","10":"tag-fuel-injector-2","11":"tag-fuel-line","12":"tag-fuel-pump-2","13":"tag-fuel-tank-2","14":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What You Need To Know About Modern Fuel Systems - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Your vehicle\u2019s fuel system is a fascinating mix of pumps, lines, and injectors. Read on if you want to learn more about it.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.carparts.com\/blog\/what-you-need-to-know-about-modern-fuel-systems\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What You Need To Know About Modern Fuel Systems - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Your vehicle\u2019s fuel system is a fascinating mix of pumps, lines, and injectors. 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