{"id":37813,"date":"2016-12-20T20:31:58","date_gmt":"2016-12-21T01:31:58","guid":{"rendered":"http:\/\/www.freeautomechanic.com\/mechanic\/forum\/?p=37813"},"modified":"2016-12-20T20:31:58","modified_gmt":"2016-12-21T01:31:58","slug":"code-p0300-2001-chevy-tahoe-2wd-5-3","status":"publish","type":"post","link":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/2016\/12\/code-p0300-2001-chevy-tahoe-2wd-5-3","title":{"rendered":"Code P0300 2001 Chevy Tahoe 2wd 5.3"},"content":{"rendered":"<p><img decoding=\"async\" class=\"aligncenter size-full wp-image-34530\" src=\"\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-content\/uploads\/2016\/02\/2003-chevy-tahoe.jpg\" alt=\"Chevy tahoe\" width=\"558\" height=\"232\" srcset=\"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-content\/uploads\/2016\/02\/2003-chevy-tahoe.jpg 558w, https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-content\/uploads\/2016\/02\/2003-chevy-tahoe-300x125.jpg 300w\" sizes=\"(max-width: 558px) 100vw, 558px\" \/>Recently the engine service light came up with code P0300 multiple misfires. I used timing light to pin point which cylinder wasn&#8217;t firing and came up with #4 and #8. So I checked wire for resistance and plugs seemed to be fine. In addition I replaced both coils and I still have multiple misfires on #4 and #8. my next step would be?<\/p>\n<hr \/>\n<p>RESPONSE<\/p>\n<ul>\n<li><a href=\"\/\/www.freeautomechanic.com\/engine-misfire.html\"><strong>Engine Misfire Causes<\/strong><\/a><\/li>\n<\/ul>\n<h3>Chevy Code P0300 &#8211; Cylinder Misfire Detected Random Cylinders<\/h3>\n<p>The P0300 code means that a cylinder(s) is misfiring or is randomly misfiring. Therefore , start by checking for intake leaks, intake gaskets are common caused of multi-cylinder misfiring. If no leak are found the next step is to replace the spark plugs.\u00a0In conclusion if the problem persist more tests needs to be done to diagnose problem, proceed to &#8220;Possible Causes&#8221;.<\/p>\n<h4>P0300 Possible causes<\/h4>\n<ul>\n<li>Faulty spark plug (s)<\/li>\n<li>Faulty ignition coil (s)<\/li>\n<li>Clogged or faulty fuel injector (s)<\/li>\n<li>Intake air leak<\/li>\n<li>Fuel injectors harness is open or shorted<\/li>\n<li>Fuel Injectors circuit poor electrical connection<\/li>\n<li>Ignition coils harness is open or shorted<\/li>\n<li>Ignition coils circuit poor electrical connection<\/li>\n<li>Insufficient cylinders compression<\/li>\n<li>Incorrect fuel pressure<\/li>\n<\/ul>\n<p>There is a factory Technical Service Bulletin on this Vehicle for Code P0300: <a href=\"\/\/www.freeautomechanic.com\/pdf\/TSB-03-06-04-030F.pdf\"><strong>TSB#03-06-030F<\/strong><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Recently the engine service light came up with code P0300 multiple misfires. I used timing light to pin point which cylinder wasn&#8217;t firing and came up with #4 and #8. So I checked wire for resistance and plugs seemed to be fine. In addition I replaced both coils and I still have multiple misfires on&hellip;&nbsp;<a href=\"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/2016\/12\/code-p0300-2001-chevy-tahoe-2wd-5-3\" rel=\"bookmark\">Read More &raquo;<span class=\"screen-reader-text\">Code P0300 2001 Chevy Tahoe 2wd 5.3<\/span><\/a><\/p>\n","protected":false},"author":14189,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","footnotes":""},"categories":[1,3],"tags":[11180,542,7634],"class_list":["post-37813","post","type-post","status-publish","format-standard","hentry","category-auto-repair-questions","category-chevy","tag-engine-misfire","tag-p0300","tag-tahoe"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v23.0 (Yoast SEO v28.1) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Code P0300 2001 Chevy Tahoe 2wd 5.3 - FreeAutoMechanic Advice<\/title>\n<meta name=\"description\" content=\"recently engine service light came up with code P0300 multiple misfires. 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