{"id":79885,"date":"2022-12-17T15:04:47","date_gmt":"2022-12-17T23:04:47","guid":{"rendered":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/?p=79885"},"modified":"2022-12-17T15:04:53","modified_gmt":"2022-12-17T23:04:53","slug":"rough-idle-2014-buick-regal-gs-2-0l-turbo","status":"publish","type":"post","link":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/2022\/12\/rough-idle-2014-buick-regal-gs-2-0l-turbo","title":{"rendered":"Rough Idle 2014 Buick Regal GS 2.0L Turbo"},"content":{"rendered":"\n<p>2014 Buick Regal GS,2.0L LTG turbo engine,74K miles<br \/>Hello everyone !! I&#8217;m having a rough idle felt most when the car is in drive and pressing on the brake.<br \/>No check engine light, but at one time had a P0171-00 pending code which never came back. It takes about 5 seconds once its put in drive with the brake depressed to start feeling it get rough. When its in Park, you can barely feel it.<br \/>Other than the idle issues the car runs fine, normal gas mileage as well. I do my own maintenance on the car. Spark plugs were changed at 55K and I just cleaned the <a href=\"https:\/\/www.freeautomechanic.com\/maf-mass-air-flow-sensor.html\">MAF<\/a>. I looked for vacuum leaks visually and with spray but found nothing. This car has a separate mechanical vacuum pump. To eliminate the possibility of a vacuum leak from the brake booster, as a test I removed the vacuum line to the check valve and plugged it, but the problem was still there.<br \/>Long fuel trims do not look good. I took 2 videos of live data from my scan tool so you can get an idea what I have.<br \/>If there is any other live data that can help with this please tell me and I will post it.<br \/>Thank You !<br \/>https:\/\/youtu.be\/QZWpnIFr5Xg<br \/>https:\/\/youtu.be\/DVIxeFxxVuU<\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p>Not sure if this will help understand the issue more but came across a TSB that might help. I&#8217;ll post it below. There are other TSBs related to rough idle but are accompanied with check engine light codes. The TSB#16-NA-383 refers to carbon build up on the valves. <\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-rough-idle-tsb-pi1223b\">Rough Idle TSB#PI1223B<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-content\/uploads\/2022\/12\/TSB-PI1223B.jpg\"><img decoding=\"async\" width=\"823\" height=\"733\" src=\"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-content\/uploads\/2022\/12\/TSB-PI1223B.jpg\" alt=\"\" class=\"wp-image-79924\"\/><\/a><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>2014 Buick Regal GS,2.0L LTG turbo engine,74K milesHello everyone !! I&#8217;m having a rough idle felt most when the car is in drive and pressing on the brake.No check engine light, but at one time had a P0171-00 pending code which never came back. It takes about 5 seconds once its put in drive with&hellip;&nbsp;<a href=\"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/2022\/12\/rough-idle-2014-buick-regal-gs-2-0l-turbo\" rel=\"bookmark\">Read More &raquo;<span class=\"screen-reader-text\">Rough Idle 2014 Buick Regal GS 2.0L Turbo<\/span><\/a><\/p>\n","protected":false},"author":17561,"featured_media":79925,"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":[1,54],"tags":[],"class_list":["post-79885","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-auto-repair-questions","category-buick"],"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>Rough Idle 2014 Buick Regal GS 2.0L Turbo - FreeAutoMechanic Advice<\/title>\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.freeautomechanic.com\/mechanic\/forum\/2022\/12\/rough-idle-2014-buick-regal-gs-2-0l-turbo\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Rough Idle 2014 Buick Regal GS 2.0L Turbo\" \/>\n<meta property=\"og:description\" content=\"2014 Buick Regal GS,2.0L LTG turbo engine,74K milesHello everyone !! I&#8217;m having a rough idle felt most when the car is in drive and pressing on the brake.No check engine light, but at one time had a P0171-00 pending code which never came back. 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I&#8217;m having a rough idle felt most when the car is in drive and pressing on the brake.No check engine light, but at one time had a P0171-00 pending code which never came back. It takes about 5 seconds once its put in drive with&hellip;&nbsp;Read More &raquo;Rough Idle 2014 Buick Regal GS 2.0L Turbo","og_url":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/2022\/12\/rough-idle-2014-buick-regal-gs-2-0l-turbo","og_site_name":"FreeAutoMechanic Advice","article_publisher":"https:\/\/www.facebook.com\/freeautomechanic","article_published_time":"2022-12-17T23:04:47+00:00","article_modified_time":"2022-12-17T23:04:53+00:00","og_image":[{"width":821,"height":459,"url":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-content\/uploads\/2022\/12\/2014-buick-regal.jpg","type":"image\/jpeg"}],"author":"Joey14","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Joey14","Est. reading time":"2 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