{"id":84228,"date":"2023-05-26T02:43:33","date_gmt":"2023-05-26T09:43:33","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=84228"},"modified":"2023-10-11T17:04:19","modified_gmt":"2023-10-12T00:04:19","slug":"bad-throttle-spring-symptoms-and-faq","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/bad-throttle-spring-symptoms-and-faq\/","title":{"rendered":"Bad Throttle Spring Symptoms and FAQ"},"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\"> 4<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span><style>.kadence-column_0a3a6a-2f > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_0a3a6a-2f > .kt-inside-inner-col,.kadence-column_0a3a6a-2f > .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_0a3a6a-2f > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_0a3a6a-2f > .kt-inside-inner-col{flex-direction:column;}.kadence-column_0a3a6a-2f > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_0a3a6a-2f > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_0a3a6a-2f{position:relative;}@media all and (max-width: 1024px){.kadence-column_0a3a6a-2f > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_0a3a6a-2f > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_0a3a6a-2f qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-979908  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-24b13e\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading_2b0398-b9, .wp-block-kadence-advancedheading.kt-adv-heading_2b0398-b9[data-kb-block=\"kb-adv-heading_2b0398-b9\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading_2b0398-b9 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading_2b0398-b9[data-kb-block=\"kb-adv-heading_2b0398-b9\"] 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_2b0398-b9 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading_2b0398-b9[data-kb-block=\"kb-adv-heading_2b0398-b9\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading_2b0398-b9 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading_2b0398-b9\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>A throttle spring can refer to a small spring around the throttle shaft that returns the throttle shaft to its original position after you release the acceleration pedal.<\/li><li>In other applications, a throttle spring is a linear spring with hooks on both ends. One end is connected to a bracket, while the opposite end is hooked to a throttle lever.<\/li><li>Some of the symptoms of a bad throttle spring include a stuck gas pedal, a high idle speed, and a clogged throttle body.<\/li><\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>Unless you own a drive-by-wire vehicle, your vehicle most likely has a throttle return spring. This spring is responsible for closing your vehicle&rsquo;s throttle valve after you open it by accelerating. If the spring is disconnected or broken, the throttle may not return to idle after you release the accelerator. Electronic throttle bodies have a return spring as well, but that&rsquo;s not what closes the throttle on an ETC system; the motor drives the throttle closed.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Is a Throttle Spring?<\/h2>\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\/throttle-return-spring-1024x680.jpg\" alt=\"throttle return spring diagram\" class=\"wp-image-86006\" width=\"1024\" height=\"680\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/06\/throttle-return-spring-1024x680.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/06\/throttle-return-spring-300x199.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/06\/throttle-return-spring-768x510.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/06\/throttle-return-spring-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/06\/throttle-return-spring.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>Diagram of a throttle return spring | Image Source: Richard McCuistian<\/figcaption><\/figure>\n\n\n\n<p>A <a href=\"https:\/\/www.carparts.com\/throttle-return-spring\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"throttle return spring\">throttle return spring<\/a> can either be a small spring around the throttle shaft that returns the throttle shaft to its original position after you release the accelerator pedal or it will be a linear spring with hooks on both ends connected on one end to a bracket with the opposite end hooked to the throttle lever.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>If the throttle spring is disconnected or broken, the throttle may not return to idle after you release the accelerator.<\/p><cite>&ndash;<a href=\"https:\/\/www.carparts.com\/blog\/author\/richardmccuistian\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Richard McCuistian, ASE Certified Master Automobile Technician\">Richard McCuistian, ASE Certified Master Automobile Technician<\/a><\/cite><\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">Symptoms of a Bad Throttle Spring<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Stuck Gas Pedal<\/h3>\n\n\n\n<p>A stuck <a href=\"https:\/\/www.carparts.com\/accelerator-pedal\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"accelerator or gas pedal\">accelerator or gas pedal<\/a> can be a sign of a bad throttle spring. Because the spring is broken, it can no longer provide enough tension to close the butterfly valve. When you take your foot off of the accelerator, it might return to its position very slowly or not move at all. This can be dangerous, especially when driving in heavy traffic.<\/p>\n\n\n\n<p>Keep in mind that a sticky gas pedal can also be a sign of other <a href=\"https:\/\/www.carparts.com\/blog\/bad-throttle-body-symptoms\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"throttle issues\">throttle issues<\/a>, so it&rsquo;s best to bring your vehicle to a mechanic for a thorough inspection.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">High Idle Speed<\/h3>\n\n\n\n<p>If you start noticing your vehicle has an unusually high idle speed, it might be because of a bad throttle spring. A faulty spring won&rsquo;t be able to close the throttle valve, and a throttle valve that won&rsquo;t close introduces more air in the engine, causing an increase in <a href=\"https:\/\/www.carparts.com\/blog\/what-is-a-normal-engine-idle-rpm\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"idle speed\">idle speed<\/a>. A high idle speed can waste fuel and damage your engine, so it&rsquo;s best to replace your faulty throttle spring as soon as possible.<\/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<h3 class=\"wp-block-heading\">Clogged Throttle Body<\/h3>\n\n\n\n<p>Your vehicle&rsquo;s throttle body will accumulate dirt, grime, and soot over time, but a bad spring can cause it to clog faster. A spring with no resistance can no longer close the valve, which will allow air to freely enter the throttle body. This increases the chances of more dirt entering the engine, which will eventually clog the throttle and prevent air-fuel flow.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does a Throttle Spring Do?<\/h2>\n\n\n\n<p>While the <a href=\"https:\/\/www.carparts.com\/throttle-cable\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"throttle cable\">throttle cable<\/a> pulls the valve open, the throttle spring closes it. When you press on the accelerator pedal, the throttle valve opens to allow more air to enter the engine. Then, the engine releases more fuel to balance the <a href=\"https:\/\/www.carparts.com\/blog\/what-is-a-good-air-fuel-ratio-chart-included\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"air-fuel ratio\">air-fuel ratio<\/a>, resulting in an increase of power and speed. Taking your foot off the pedal will allow the throttle return spring to push the valve closed.<\/p>\n\n\n\n<p>The spring also holds the valve in a default position, also known as the neutral or fail-safe position. This varies per vehicle, but in general, a neutral position means the valve is 16% to 20% open. This results in a speed of 1200 to 1500 <a href=\"https:\/\/www.carparts.com\/blog\/what-does-car-rpm-stand-for\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"revolutions per minute (RPM)\">revolutions per minute (RPM)<\/a>.<\/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\/05\/car-idle-speed-1024x683.jpg\" alt=\"tachometer showing an idle speed\" class=\"wp-image-84385\" width=\"1024\" height=\"683\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/05\/car-idle-speed-1024x683.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/05\/car-idle-speed-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/05\/car-idle-speed-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/05\/car-idle-speed-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/05\/car-idle-speed-1200x800.jpg 1200w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/05\/car-idle-speed-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/05\/car-idle-speed.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>A faulty throttle spring won&rsquo;t be able to close the throttle valve, and a throttle valve that won&rsquo;t close introduces more air in the engine, causing an increase in idle speed.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Throttle Spring FAQ<\/h2>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1685005463445\"><strong class=\"schema-faq-question\">Can You Drive With a Broken Throttle Return Spring?<\/strong> <p class=\"schema-faq-answer\">While a broken spring won&rsquo;t stop your engine from running, it isn&rsquo;t a good idea to drive around with one. A broken spring can make it hard for you to accelerate, which puts you and your passengers at risk of traffic accidents. It&rsquo;s best to take your vehicle to a mechanic as soon as possible if you suspect it might have a faulty throttle spring.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1685005486004\"><strong class=\"schema-faq-question\">Do All Vehicles Have a Throttle Spring?<\/strong> <p class=\"schema-faq-answer\">Not all vehicles have a throttle spring. Vehicles with an electric throttle control (ETC) or a drive-by-wire system use an electric actuator motor instead of a mechanical cable. The ETC system opens the throttle valve electrically, so it no longer needs a spring to open and close the plate.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1685005515688\"><strong class=\"schema-faq-question\">How Often Should You Replace Throttle Return Springs?<\/strong> <p class=\"schema-faq-answer\">Unlike most parts of your vehicle, throttle springs don&rsquo;t require regular maintenance or servicing. A high-quality spring usually has a similar lifespan to your vehicle. However, if it isn&rsquo;t installed correctly, it can wear out and break over time.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1685005530882\"><strong class=\"schema-faq-question\">How Much Does a Throttle Spring Replacement Cost?<\/strong> <p class=\"schema-faq-answer\">The price can vary based on several factors, such as your vehicle&rsquo;s make, model, and the product&rsquo;s brand. In general, most throttle springs cost less than $10, while some replacement kits can cost you around $25.<\/p> <\/div> <\/div>\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\"> 4<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>Unless you own a drive-by-wire vehicle, your vehicle most likely has a throttle return spring. This spring is responsible for&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/bad-throttle-spring-symptoms-and-faq\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":84383,"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":[3793],"ppma_author":[2607,2985],"class_list":{"0":"post-84228","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-diy","8":"category-engine","9":"tag-throttle-return-spring","10":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Bad Throttle Spring Symptoms and FAQ - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Are you experiencing acceleration issues with your vehicle? It might be because of a faulty throttle spring. Learn more about it here.\" \/>\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\/bad-throttle-spring-symptoms-and-faq\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Bad Throttle Spring Symptoms and FAQ - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Are you experiencing acceleration issues with your vehicle? It might be because of a faulty throttle spring. Learn more about it here.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/bad-throttle-spring-symptoms-and-faq\/\" \/>\n<meta property=\"og:site_name\" content=\"In The Garage with CarParts.com\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/carpartscom\" \/>\n<meta property=\"article:published_time\" content=\"2023-05-26T09:43:33+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-10-12T00:04:19+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/05\/throttle-return-spring.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1500\" \/>\n\t<meta property=\"og:image:height\" content=\"998\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@carpartscom\" \/>\n<meta name=\"twitter:site\" content=\"@carpartscom\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/bad-throttle-spring-symptoms-and-faq\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/bad-throttle-spring-symptoms-and-faq\\\/\"},\"author\":[{\"@type\":\"Person\",\"$id\":\"4\",\"name\":\"CarParts.com Research Team\",\"jobTitle\":\"Expert Automotive Writer\",\"description\":\"The CarParts.com Research Team is composed of experienced automotive and tech writers working with (ASE)-certified automobile technicians and automotive journalists to bring up-to-date, helpful information to car owners in the US. 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