{"id":21646,"date":"2021-01-20T23:38:36","date_gmt":"2021-01-21T07:38:36","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=21646"},"modified":"2025-03-18T20:04:19","modified_gmt":"2025-03-19T03:04:19","slug":"bad-ignition-coil-symptoms-5-signs-you-may-need-a-replacement","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/bad-ignition-coil-symptoms-5-signs-you-may-need-a-replacement\/","title":{"rendered":"Bad Ignition Coil Symptoms: 5 Signs You May Need a Replacement"},"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\"> 6<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span><style>.kadence-column21646_c585c7-bb > .kt-inside-inner-col,.kadence-column21646_c585c7-bb > .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-column21646_c585c7-bb > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column21646_c585c7-bb > .kt-inside-inner-col{flex-direction:column;}.kadence-column21646_c585c7-bb > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column21646_c585c7-bb > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column21646_c585c7-bb{position:relative;}@media all and (max-width: 1024px){.kadence-column21646_c585c7-bb > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column21646_c585c7-bb > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column21646_c585c7-bb inner-column-1 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-d1e562  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-1961cb\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading21646_91c3b8-d7, .wp-block-kadence-advancedheading.kt-adv-heading21646_91c3b8-d7[data-kb-block=\"kb-adv-heading21646_91c3b8-d7\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading21646_91c3b8-d7 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading21646_91c3b8-d7[data-kb-block=\"kb-adv-heading21646_91c3b8-d7\"] 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-heading21646_91c3b8-d7 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading21646_91c3b8-d7[data-kb-block=\"kb-adv-heading21646_91c3b8-d7\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading21646_91c3b8-d7 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading21646_91c3b8-d7\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Some of the common symptoms of a bad ignition coil include an illuminated check engine light, the vehicle refusing to start, and engine misfires.<\/strong><\/li>\n\n\n\n<li>An ignition coil is a transformer that converts battery voltage into the tens of thousands of volts needed to fire the spark plugs.<\/li>\n\n\n\n<li>A faulty ignition coil can damage other parts of the vehicle, such as the catalytic converter, powertrain control module, and the engine.<\/li>\n\n\n\n<li>The cost of a new ignition coil will largely depend on your vehicle&rsquo;s specifications. Some ignition coils can cost as little as $35, while others can cost up to $300 or more. You&rsquo;ll also need to shell out some extra cash for labor fees.<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>All cars have an ignition system with one or more ignition coils. Ignition coils are designed to convert the low-voltage from the battery into the high-voltage needed to fire the spark plugs.<\/p>\n\n\n\n<p>Because ignition coils are such an integral part of the ignition system, they almost always cause noticeable symptoms when they fail.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/01\/ignition-coil-replacement-on-gasoline-1024x683.jpeg\" alt=\"ignition coil replacement\" class=\"wp-image-21652\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/01\/ignition-coil-replacement-on-gasoline-1024x683.jpeg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/01\/ignition-coil-replacement-on-gasoline-300x200.jpeg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/01\/ignition-coil-replacement-on-gasoline-768x512.jpeg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/01\/ignition-coil-replacement-on-gasoline-1536x1024.jpeg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/01\/ignition-coil-replacement-on-gasoline-scaled.jpeg 2048w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/01\/ignition-coil-replacement-on-gasoline-600x400.jpeg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/01\/ignition-coil-replacement-on-gasoline-150x100.jpeg 150w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">Ignition coils are designed to convert the low-voltage from the battery into the high-voltage needed to fire the spark plugs.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Signs of a Bad Ignition Coil<\/h2>\n\n\n\n<p>Do you think your car might have a bad ignition coil? If you&rsquo;re experiencing one or more of the following symptoms, you may be right.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Engine Misfire<\/h3>\n\n\n\n<p>Since ignition coils play a role in igniting the engine&rsquo;s air-fuel mixture, a faulty coil can easily cause a misfire. A misfire happens when there&rsquo;s incomplete combustion (or zero combustion) inside one or more of the engine&rsquo;s cylinders.<\/p>\n\n\n\n<p>The phenomenon will feel like a hesitation or <a href=\"https:\/\/www.carparts.com\/blog\/why-is-my-car-shaking-and-the-check-engine-light-is-on-faq\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"shaking\">shaking<\/a> when the car is running. You may notice the problem intensifies when the engine is under a heavy load (e.g., accelerating).<\/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\">Illuminated Check Engine Light<\/h3>\n\n\n\n<p>On modern cars, a computer (often referred to as the powertrain control module), looks for problems that could potentially lead to an increase in vehicle emissions. One such problem is an engine misfire caused by a faulty coil. The PCM will usually detect the misfire&mdash;and possibly an issue with the coil&rsquo;s electrical circuit&mdash;and <a href=\"https:\/\/www.carparts.com\/blog\/check-engine-light-flashing\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"turn on the check engine light\">turn on the check engine light<\/a>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Car Won&rsquo;t Start<\/h3>\n\n\n\n<p>While most modern engines have one ignition coil per cylinder, older vehicles use a single coil to supply voltage to all of the spark plugs. If that lone coil fails, none of the cylinders will receive spark, resulting in a car that cranks but <a href=\"https:\/\/www.carparts.com\/blog\/my-car-wont-start-what-should-i-do\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"doesn&rsquo;t start\">doesn&rsquo;t start<\/a>.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/01\/woman-starting-engine-by-inserting-car-key-1024x683.jpeg\" alt=\"woman starting engine by inserting car key\" class=\"wp-image-21649\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/01\/woman-starting-engine-by-inserting-car-key-1024x683.jpeg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/01\/woman-starting-engine-by-inserting-car-key-300x200.jpeg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/01\/woman-starting-engine-by-inserting-car-key-768x512.jpeg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/01\/woman-starting-engine-by-inserting-car-key-1536x1024.jpeg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/01\/woman-starting-engine-by-inserting-car-key-scaled.jpeg 2048w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/01\/woman-starting-engine-by-inserting-car-key-600x400.jpeg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/01\/woman-starting-engine-by-inserting-car-key-150x100.jpeg 150w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">If none of the cylinders receive spark from a spark plug because of a bad ignition coil, the car might crank but fail to start.<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">The Engine Stalls<\/h3>\n\n\n\n<p>Like most electrical devices, ignition coils can experience intermittent problems. When this happens, the <a href=\"https:\/\/www.carparts.com\/blog\/car-shuts-off-while-driving-causes-what-to-do\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"engine may stall\">engine may stall<\/a> unexpectedly. Stalling mostly happens to engines with just one ignition coil.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Reduced Fuel Economy<\/h3>\n\n\n\n<p>A faulty ignition coil usually results in an engine that misfires and runs poorly, leading to a reduction in fuel economy.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does an Ignition Coil Do?<\/h2>\n\n\n\n<p>An ignition coil is a transformer that converts battery voltage into the tens of thousands of volts needed to fire the spark plugs. Ignition coil operation is based on a phenomenon called electromagnetic induction&mdash;a process that uses a magnetic field to generate electrical current.<\/p>\n\n\n\n<p>Inside the coil, there are two sets of windings. The so-called primary windings contain a hundred or so coils of wire, whereas the secondary windings have thousands of coils of wire.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/01\/coil-on-plug-ignition-coil-1024x683.jpg\" alt=\"coil on plug ignition coil\" class=\"wp-image-21648\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/01\/coil-on-plug-ignition-coil-1024x683.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/01\/coil-on-plug-ignition-coil-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/01\/coil-on-plug-ignition-coil-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/01\/coil-on-plug-ignition-coil-1536x1024.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/01\/coil-on-plug-ignition-coil-scaled.jpg 2048w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/01\/coil-on-plug-ignition-coil-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/01\/coil-on-plug-ignition-coil-150x100.jpg 150w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">Newer vehicles use either coil-on-plug (COP) ignition coils or coil packs.<\/figcaption><\/figure>\n\n\n\n<p>When the ignition coil is energized, battery voltage flows through the primary windings, creating a magnetic field. Opening the coil&rsquo;s circuit causes that field to collapse, resulting in tens of thousands of volts being induced in the coil&rsquo;s secondary windings. The high voltage from the secondary windings then travels from the coil to the rest of the ignition system.<\/p>\n\n\n\n<p>It&rsquo;s important to note that there are different types of ignition coils. Older vehicles have a single ignition coil that&rsquo;s connected to a distributor via an ignition wire. High-voltage travels from the coil to the distributor, which, in turn, distributes that voltage to the individual spark plugs and wires.<\/p>\n\n\n\n<p>Newer vehicles use either coil-on-plug (COP) ignition coils or coil packs. Engines with a COP ignition system have one ignition coil per cylinder. Each coil sits directly on top of a spark plug.<\/p>\n\n\n\n<p>Meanwhile, a coil pack is a group of ignition coils combined together in a single molded block. With this design, each cylinder gets its own ignition tower but shares its coil with a companion cylinder.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/01\/coil-pack-white-bg-1024x683.jpg\" alt=\"coil pack on white background\" class=\"wp-image-21647\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/01\/coil-pack-white-bg-1024x683.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/01\/coil-pack-white-bg-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/01\/coil-pack-white-bg-768x513.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/01\/coil-pack-white-bg-1536x1025.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/01\/coil-pack-white-bg-scaled.jpg 2048w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/01\/coil-pack-white-bg-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/01\/coil-pack-white-bg-150x100.jpg 150w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">A coil pack is a group of ignition coils combined together in a single molded block.<\/figcaption><\/figure>\n\n\n\n<p>Here&rsquo;s a video about how ignition coil works:<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"How Ignition Coils Work | CarParts.com Parts Explained\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/87d2bGdO0IU?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">How to Tell If an Ignition Coil is Bad<\/h2>\n\n\n\n<p>You must test an ignition coil to determine whether it&rsquo;s bad. As we discuss in our article on <a href=\"https:\/\/www.carparts.com\/blog\/how-do-you-test-a-coil-pack\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"how to test a coil pack or ignition coil\">how to test a coil pack or ignition coil<\/a>, several test methods are available.<\/p>\n\n\n\n<p>To conduct a quick performance test, first locate the ignition coil. In most cases, there&rsquo;s an ignition pack for each cylinder, which you&rsquo;ll find above the engine.<\/p>\n\n\n\n<p>After locating the ignition coil, it&rsquo;s now time to conduct a power balance test. To do this, turn on the engine and disconnect an individual ignition coil.<\/p>\n\n\n\n<p>If there&rsquo;s a decrease in RPMs after disconnecting the chosen ignition coil, it means that it&rsquo;s working in full capacity.<\/p>\n\n\n\n<p>Keep checking each ignition coil. If you disconnect one that has no impact on the RPMs, that&rsquo;s the one that needs a replacement.<\/p>\n\n\n\n<p>Of course, this method can only be done by someone who has the necessary information and knowledge on auto repair.<\/p>\n\n\n\n<p>Check out these tutorial videos in case you need to replace your ignition coil:<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"How to replace the Ignition Coils 2009-2018 Dodge RAM 1500 &#9889;\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/GXGWeAVGIOo?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"How to replace the Ignition Coils 2009-2014 Ford F150 &#9889;\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/sAjkDnfDwHg?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p>If you&rsquo;re not comfortable with performing a diagnostic test on your own, you could always take your vehicle (assuming that it&rsquo;s still running even with a bad ignition coil) to the nearest auto repair shop and have a professional do the job for you.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Is It Ok to Drive With a Bad Ignition Coil?<\/h2>\n\n\n\n<p>A faulty ignition coil can damage other parts of the vehicle, such as the catalytic converter, the powertrain control module&mdash;even the engine. A faulty coil should be replaced right away to avoid bigger problems down the road.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How Much Will a New Ignition Coil Cost?<\/h2>\n\n\n\n<p>The cost of a new ignition coil will largely depend on your vehicle&rsquo;s specifications. Some ignition coils can cost as little as $35, while others can cost up to $300 or more. You&rsquo;ll also need to shell out some extra cash for labor fees.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Where to Get a Dependable Ignition Coil for Your Vehicle<\/h2>\n\n\n\n<p>A bad ignition coil will cause serious problems for your engine, such as misfires and stalling. If left unattended, the malfunctioning part can also affect other engine parts that cost more to repair or replace. Fortunately, we make it easy to get a replacement ignition coil from CarParts.com.<\/p>\n\n\n\n<p>Here at <a href=\"https:\/\/www.carparts.com\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"CarParts.com\">CarParts.com<\/a>, it&rsquo;s our mission to help you quickly get your vehicle back on the road where it belongs. Order now and get your new ignition coil in as fast as two business days. We provide accurate and detailed information on a part&rsquo;s fitment to guarantee it will fit your vehicle perfectly. And if for some reason you aren&rsquo;t fully satisfied with your order, we accept returns within 60 days of purchase with money-back guarantee.<\/p>\n\n\n\n<p>Don&rsquo;t wait for an old or damaged ignition coil to give up the ghost. Check out our extensive selection of dependable <a href=\"https:\/\/www.carparts.com\/ignition-coil\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"ignition coils\">ignition coils<\/a> and shop now at CarParts.com.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Products Mentioned in this Guide<\/h2>\n\n\n\n<div class=\"reusable-productlink\">\n\n    <!-- start of editable content -->\n\n    <a href=\"https:\/\/www.carparts.com\/ignition-coil\" target=\"_blank\" aria-label=\"ignition coil\" rel=\"noopener\">\n        <img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/d_noimage.jpg,h_200,w_200,c_pad,f_auto,q_auto,dpr_auto,e_sharpen\/images\/repi504604_1\" alt=\"ignition coil\">\n\t<strong>Ignition Coil<\/strong>\n    <\/a>\n\n    <a href=\"https:\/\/www.carparts.com\/spark-plug\" target=\"_blank\" aria-label=\"spark plug\" rel=\"noopener\">\n        <img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/d_noimage.jpg,h_200,w_200,c_pad,f_auto,q_auto,dpr_auto,e_sharpen\/images\/np06k905601m_1\" alt=\"spark plug\">\n\t<strong>Spark Plug<\/strong>\n    <\/a>\n\n\n    <!-- end of editable content -->\n\n<\/div>\n\n\n\n<p><\/p>\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\"> 6<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>All cars have an ignition system with one or more ignition coils. Ignition coils are designed to convert the low-voltage&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/bad-ignition-coil-symptoms-5-signs-you-may-need-a-replacement\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":29,"featured_media":21713,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":true,"_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":[52,3744],"tags":[1169],"ppma_author":[2622],"class_list":{"0":"post-21646","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-diy","8":"category-ignition-system","9":"tag-ignition-coil-2","10":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Bad Ignition Coil Symptoms: 5 Signs You May Need a Replacement - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Do you think your car might have a bad ignition coil? If you\u2019re experiencing one or more of the following symptoms, you may be right.\" \/>\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-ignition-coil-symptoms-5-signs-you-may-need-a-replacement\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Bad Ignition Coil Symptoms: 5 Signs You May Need a Replacement - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Do you think your car might have a bad ignition coil? 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