{"id":8997,"date":"2017-06-11T23:58:07","date_gmt":"2017-06-11T23:58:07","guid":{"rendered":"http:\/\/mazdaman.x10host.com\/sm352664\/"},"modified":"2017-06-11T23:58:07","modified_gmt":"2017-06-11T23:58:07","slug":"sm352664","status":"publish","type":"page","link":"https:\/\/www.hexorcism.com\/16ND\/sm352664\/","title":{"rendered":"NO.21 ENGINE NOISE [SKYACTIV-G 2.0]"},"content":{"rendered":"<div class=\"node node SERVICE_MANUALS\">\n    <\/p>\n<div class=\"textleft\">\n<div class=\"attr CONTENT c2\">\n<div class=\"content\">\n          <link rel=\"stylesheet\" type=\"text\/css\" href=\"style.css\" media=\"screen\"><a class=\"prevPage\" href=\"SM352663\">&lt; Previous<\/a> <a class=\"nextPage\" href=\"SM352665\">Next &gt;<\/a><\/p>\n<h2>2016 &#8211; MX-5 &#8211; Engine<\/h2>\n<p><a name=\"id0103e6802700\" id=\"id0103e6802700\"><\/a><\/p>\n<h3>NO.21 ENGINE NOISE [SKYACTIV-G 2.0]<\/h3>\n<table border=\"1\" cellpadding=\"0\" cellspacing=\"@colsep\" bordercolor=\"#CCCCCC\" frame=\"box\" rules=\"all\">\n<tbody valign=\"\" cellspacing=\"1\" rowspan=\"\">\n<tr valign=\"\" align=\"\" cellspacing=\"\" rowspan=\"\">\n<td valign=\"middle\" align=\"center\" cellspacing=\"\" rowspan=\"\" colspan=\"NaN\">\n<p>21<\/p>\n<\/td>\n<td valign=\"middle\" align=\"left\" cellspacing=\"\" rowspan=\"\" colspan=\"NaN\">\n<p>ENGINE NOISE<\/p>\n<\/td>\n<\/tr>\n<tr valign=\"\" align=\"\" cellspacing=\"\" rowspan=\"\">\n<td valign=\"middle\" align=\"center\" cellspacing=\"\" rowspan=\"\" colspan=\"NaN\">\n<p><b>DESCRIPTION<\/b><\/p>\n<\/td>\n<td valign=\"middle\" align=\"left\" cellspacing=\"\" rowspan=\"\" colspan=\"NaN\">\n<ul type=\"disc\">\n<li>\n<p>Engine noise from under hood.<\/p>\n<\/li>\n<\/ul>\n<\/td>\n<\/tr>\n<tr valign=\"\" align=\"\" cellspacing=\"\" rowspan=\"\">\n<td valign=\"middle\" align=\"center\" cellspacing=\"\" rowspan=\"\" colspan=\"NaN\">\n<p><b>POSSIBLE CAUSE<\/b><\/p>\n<\/td>\n<td valign=\"middle\" align=\"left\" cellspacing=\"\" rowspan=\"\" colspan=\"NaN\">\n<ul>\n                      <b>Buzzing sound is heard from exhaust pipe during cold engine start:<\/b><\/p>\n<li>\n<p><b><span class=\"c1\">NOTE:<\/span><\/b><\/p>\n<ul type=\"disc\">\n<li>\n<p>During a cold engine start, sound occurs for up to <b>approx. 30 s<\/b> with fast idle up for a drive-by-wire control and the warm-up promotion spark retard correction for ignition timing control.<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<ul type=\"disc\">\n<li>\n<p>Sound occurs from drive-by-wire control, ignition control (vehicle is normal)<\/p>\n<\/li>\n<li>\n<p>Dynamic damper loose<\/p>\n<\/li>\n<li>\n<p>Exhaust system installation condition<\/p>\n<\/li>\n<li>\n<p>Intake system installation condition<\/p>\n<\/li>\n<\/ul>\n<ul type=\"disc\">\n                      <b>Squeal, click, or chirp noise:<\/b><\/p>\n<li>\n<p>Improper engine oil level<\/p>\n<\/li>\n<li>\n<p>Loose installation of solenoid valves<\/p>\n<\/li>\n<li>\n<p>Improper drive belt tension<\/p>\n<\/li>\n<li>\n<p>Generator installation<\/p>\n<\/li>\n<li>\n<p>Auto tensioner bearing malfunction<\/p>\n<\/li>\n<li>\n<p>Splash shield or under cover loose (splash water to drive belt)<\/p>\n<\/li>\n<\/ul>\n<ul type=\"disc\">\n                      <b>Rattling or creaking sound noise:<\/b><\/p>\n<li>\n<p>Improper drive belt tension<\/p>\n<\/li>\n<li>\n<p>Loose parts<\/p>\n<\/li>\n<\/ul>\n<ul type=\"disc\">\n                      <b>Hissing sound noise:<\/b><\/p>\n<li>\n<p>Vacuum leakage<\/p>\n<\/li>\n<li>\n<p>Loose spark plug<\/p>\n<\/li>\n<li>\n<p>Air leakage from the intake-air system<\/p>\n<\/li>\n<\/ul>\n<ul type=\"disc\">\n                      <b>Clattering noise:<\/b><\/p>\n<li>\n<p>Loose parts<\/p>\n<\/li>\n<\/ul>\n<ul type=\"disc\">\n                      <b>Lightly tapping or rumbling noise:<\/b><\/p>\n<li>\n<p>Dynamic damper loose<\/p>\n<\/li>\n<li>\n<p>Exhaust system loose<\/p>\n<\/li>\n<li>\n<p>Intake-air system loose<\/p>\n<\/li>\n<\/ul>\n<ul type=\"disc\">\n                      <b>Other noise:<\/b><\/p>\n<li>\n<p>Electric variable valve timing actuator malfunction<\/p>\n<\/li>\n<li>\n<p>Hydraulic variable valve timing actuator malfunction<\/p>\n<\/li>\n<li>\n<p>Timing chain noise<\/p>\n<\/li>\n<li>\n<p>Hydraulic lash adjuster (HLA) noise<\/p>\n<\/li>\n<\/ul>\n<p><b><span class=\"c1\">WARNING:<\/span><\/b><\/p>\n<ul type=\"disc\">\n<li>\n<p>The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services:<\/p>\n<\/li>\n<ul type=\"square\">\n<li>\n<p>Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel.<\/p>\n<\/li>\n<li>\n<p>Highly pressurized fuel may spray out if the fuel line is cut. Due to the following dangers occurring with a fuel spray, always complete the \u201cFuel Line Safety Procedure\u201d to prevent the fuel from spraying. (See <a href=\"SM352744\">BEFORE SERVICE PRECAUTION [SKYACTIV-G 2.0]<\/a>.)<\/p>\n<\/li>\n<ul type=\"disc\">\n<li>\n<p>Fuel may cause irritation if it comes in contact with skin and eyes.<\/p>\n<\/li>\n<li>\n<p>If fuel ignites and causes a fire, it may lead to serious injury or death, and damage to property and facilities.<\/p>\n<\/li>\n<\/ul>\n<li>\n<p>Fuel is highly flammable and dangerous. Fuel line spills and leakage can cause serious injury or death, and damage to equipment. Always refer to the \u201cQuick Release Connector Removal\/Installation (fuel system)\u201d before performing the fuel hose installation, and execute the \u201cFuel Leakage Inspection\u201d after installation. (See <a href=\"SM352742\">QUICK RELEASE CONNECTOR REMOVAL\/INSTALLATION [SKYACTIV-G 2.0]<\/a>.) (See <a href=\"SM352743\">AFTER SERVICE PRECAUTION [SKYACTIV-G 2.0]<\/a>.)<\/p>\n<\/li>\n<\/ul>\n<\/ul>\n<p><b><span class=\"c1\">CAUTION:<\/span><\/b><\/p>\n<ul type=\"disc\">\n<li>\n<p>Disconnecting\/connecting the quick release connector without cleaning it may possibly cause damage to the fuel pipe and quick release connector. Always clean the quick release connector joint area before disconnecting\/connecting, and make sure that it is free of foreign material.<\/p>\n<\/li>\n<\/ul>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\n          <b>Diagnostic Procedure<\/b><\/p>\n<table border=\"1\" cellpadding=\"0\" cellspacing=\"@colsep\" bordercolor=\"#CCCCCC\" frame=\"box\" rules=\"all\">\n<tbody valign=\"\" cellspacing=\"1\" rowspan=\"\">\n<tr valign=\"\" align=\"\" cellspacing=\"\" rowspan=\"\">\n<td valign=\"middle\" align=\"center\" cellspacing=\"\" rowspan=\"\" colspan=\"NaN\">\n<p>STEP<\/p>\n<\/td>\n<td valign=\"middle\" align=\"center\" cellspacing=\"\" rowspan=\"\" colspan=\"NaN\">\n<p>INSPECTION<\/p>\n<\/td>\n<td valign=\"middle\" align=\"center\" cellspacing=\"\" rowspan=\"\" colspan=\"NaN\">\n<p>RESULTS<\/p>\n<\/td>\n<td valign=\"middle\" align=\"center\" cellspacing=\"\" rowspan=\"\" colspan=\"NaN\">\n<p>ACTION<\/p>\n<\/td>\n<\/tr>\n<tr valign=\"\" align=\"\" cellspacing=\"\" rowspan=\"\">\n<td valign=\"top\" align=\"center\" cellspacing=\"\" rowspan=\"\" colspan=\"NaN\">\n<p>1<\/p>\n<\/td>\n<td valign=\"top\" align=\"left\" cellspacing=\"\" rowspan=\"\" colspan=\"NaN\">\n                  <b>VERIFY SYMPTOM<\/b><\/p>\n<ul type=\"disc\">\n<li>\n<p>Verify the occurring sound.<\/p>\n<\/li>\n<\/ul>\n<\/td>\n<td valign=\"top\" align=\"center\" cellspacing=\"\" rowspan=\"\" colspan=\"NaN\">\n<p>\u2014<\/p>\n<\/td>\n<td valign=\"middle\" align=\"left\" cellspacing=\"\" rowspan=\"\" colspan=\"NaN\">\n<ul type=\"disc\">\n                      <b>Buzzing sound is heard from exhaust pipe during cold engine start:<\/b><\/p>\n<li>\n<p>Go to Step 2.<\/p>\n<\/li>\n<\/ul>\n<ul type=\"disc\">\n                      <b>Squeal, click, or chirp sound is heard:<\/b><\/p>\n<li>\n<p>Go to Step 3.<\/p>\n<\/li>\n<\/ul>\n<ul type=\"disc\">\n                      <b>Rattling or creaking sound is heard:<\/b><\/p>\n<li>\n<p>Go to Step 4.<\/p>\n<\/li>\n<\/ul>\n<ul type=\"disc\">\n                      <b>Hissing sound is heard:<\/b><\/p>\n<li>\n<p>Go to Step 5.<\/p>\n<\/li>\n<\/ul>\n<ul type=\"disc\">\n                      <b>Clattering sound is heard:<\/b><\/p>\n<li>\n<p>Go to Step 6.<\/p>\n<\/li>\n<\/ul>\n<ul type=\"disc\">\n                      <b>Lightly tapping or rumbling sound is heard:<\/b><\/p>\n<li>\n<p>Go to Step 7.<\/p>\n<\/li>\n<\/ul>\n<ul type=\"disc\">\n                      <b>Other noise is heard:<\/b><\/p>\n<li>\n<p>Go to Step 8.<\/p>\n<\/li>\n<\/ul>\n<\/td>\n<\/tr>\n<tr valign=\"\" align=\"\" cellspacing=\"\" rowspan=\"\">\n<td valign=\"top\" align=\"center\" cellspacing=\"\" rowspan=\"2\" colspan=\"NaN\">\n<p>2<\/p>\n<\/td>\n<td valign=\"top\" align=\"left\" cellspacing=\"\" rowspan=\"2\" colspan=\"NaN\">\n                  <b>BUZZING SOUND IS HEARD FROM EXHAUST PIPE DURING COLD ENGINE START<\/b><\/p>\n<ul type=\"disc\">\n<li>\n<p>Verify the sound from the exhaust pipe during a cold engine start.<\/p>\n<\/li>\n<li>\n<p>Does the sound disappear after <b>approx. 30 s<\/b> have elapsed?<\/p>\n<\/li>\n<\/ul>\n<\/td>\n<td valign=\"top\" align=\"center\" cellspacing=\"\" rowspan=\"\" colspan=\"NaN\">\n<p>Yes<\/p>\n<\/td>\n<td valign=\"middle\" align=\"left\" cellspacing=\"\" rowspan=\"\" colspan=\"NaN\">\n<p><b><span class=\"c1\">NOTE:<\/span><\/b><\/p>\n<ul type=\"disc\">\n<li>\n<p>During a cold engine start, sound occurs for up to <b>approx. 30 s<\/b> with fast idle up for a drive-by-wire control and the warm-up promotion spark retard correction for ignition timing control.<\/p>\n<\/li>\n<\/ul>\n<p>Go to Step 9 because the operation is normal.<\/p>\n<\/td>\n<\/tr>\n<tr valign=\"\" align=\"\" cellspacing=\"\" rowspan=\"\">\n<td valign=\"top\" align=\"center\" cellspacing=\"\" rowspan=\"\" colspan=\"NaN\">\n<p>No<\/p>\n<\/td>\n<td valign=\"middle\" align=\"left\" cellspacing=\"\" rowspan=\"\" colspan=\"NaN\">\n<ul type=\"disc\">\n                      <b>Inspect the following:<\/b><\/p>\n<li>\n<p>Exhaust system installation condition<\/p>\n<\/li>\n<li>\n<p>Intake system installation condition<\/p>\n<\/li>\n<ul type=\"square\">\n<li>\n<p>If there is any malfunction:<\/p>\n<\/li>\n<ul type=\"disc\">\n<li>\n<p>Repair or replace the malfunctioning part according to the inspection results.<\/p>\n<\/li>\n<\/ul>\n<\/ul>\n<ul type=\"square\">\n<li>\n<p>If there is no malfunction:<\/p>\n<\/li>\n<ul type=\"disc\">\n<li>\n<p>Go to Step 9.<\/p>\n<\/li>\n<\/ul>\n<\/ul>\n<\/ul>\n<\/td>\n<\/tr>\n<tr valign=\"\" align=\"\" cellspacing=\"\" rowspan=\"\">\n<td valign=\"top\" align=\"center\" cellspacing=\"\" rowspan=\"2\" colspan=\"NaN\">\n<p>3<\/p>\n<\/td>\n<td valign=\"top\" align=\"left\" cellspacing=\"\" rowspan=\"2\" colspan=\"NaN\">\n                  <b>VERIFY IF THERE IS SQUEAL, CLICK, OR CHIRP SOUND<\/b><\/p>\n<ul type=\"disc\">\n<li>\n<p>Inspect the following:<\/p>\n<\/li>\n<ul type=\"square\">\n<li>\n<p>Engine oil level<\/p>\n<\/li>\n<li>\n<p>Solenoid valves installation<\/p>\n<\/li>\n<li>\n<p>Drive belt tension<\/p>\n<\/li>\n<li>\n<p>Generator installation<\/p>\n<\/li>\n<li>\n<p>Auto tensioner bearing damaged<\/p>\n<\/li>\n<li>\n<p>Splash shield or under cover loose<\/p>\n<\/li>\n<\/ul>\n<\/ul>\n<ul type=\"disc\">\n<li>\n<p>Is there any malfunction?<\/p>\n<\/li>\n<\/ul>\n<\/td>\n<td valign=\"top\" align=\"center\" cellspacing=\"\" rowspan=\"\" colspan=\"NaN\">\n<p>Yes<\/p>\n<\/td>\n<td valign=\"top\" align=\"left\" cellspacing=\"\" rowspan=\"\" colspan=\"NaN\">\n<p>Repair or replace the malfunctioning part according to the inspection results.<\/p>\n<\/td>\n<\/tr>\n<tr valign=\"\" align=\"\" cellspacing=\"\" rowspan=\"\">\n<td valign=\"top\" align=\"center\" cellspacing=\"\" rowspan=\"\" colspan=\"NaN\">\n<p>No<\/p>\n<\/td>\n<td valign=\"top\" align=\"left\" cellspacing=\"\" rowspan=\"\" colspan=\"NaN\">\n<p>Go to Step 9.<\/p>\n<\/td>\n<\/tr>\n<tr valign=\"\" align=\"\" cellspacing=\"\" rowspan=\"\">\n<td valign=\"top\" align=\"center\" cellspacing=\"\" rowspan=\"2\" colspan=\"NaN\">\n<p>4<\/p>\n<\/td>\n<td valign=\"top\" align=\"left\" cellspacing=\"\" rowspan=\"2\" colspan=\"NaN\">\n                  <b>VERIFY IF THERE IS RATTLING OR CREAKING SOUND<\/b><\/p>\n<ul type=\"disc\">\n<li>\n<p>Inspect the following:<\/p>\n<\/li>\n<ul type=\"square\">\n<li>\n<p>Drive belt tension<\/p>\n<\/li>\n<li>\n<p>Loose parts in engine compartment<\/p>\n<\/li>\n<\/ul>\n<\/ul>\n<ul type=\"disc\">\n<li>\n<p>Is there any malfunction?<\/p>\n<\/li>\n<\/ul>\n<\/td>\n<td valign=\"top\" align=\"center\" cellspacing=\"\" rowspan=\"\" colspan=\"NaN\">\n<p>Yes<\/p>\n<\/td>\n<td valign=\"top\" align=\"left\" cellspacing=\"\" rowspan=\"\" colspan=\"NaN\">\n<p>Repair or replace the malfunctioning part according to the inspection results.<\/p>\n<\/td>\n<\/tr>\n<tr valign=\"\" align=\"\" cellspacing=\"\" rowspan=\"\">\n<td valign=\"top\" align=\"center\" cellspacing=\"\" rowspan=\"\" colspan=\"NaN\">\n<p>No<\/p>\n<\/td>\n<td valign=\"top\" align=\"left\" cellspacing=\"\" rowspan=\"\" colspan=\"NaN\">\n<p>Go to Step 9.<\/p>\n<\/td>\n<\/tr>\n<tr valign=\"\" align=\"\" cellspacing=\"\" rowspan=\"\">\n<td valign=\"top\" align=\"center\" cellspacing=\"\" rowspan=\"2\" colspan=\"NaN\">\n<p>5<\/p>\n<\/td>\n<td valign=\"top\" align=\"left\" cellspacing=\"\" rowspan=\"2\" colspan=\"NaN\">\n                  <b>VERIFY IF THERE IS HISSING SOUND<\/b><\/p>\n<ul type=\"disc\">\n<li>\n<p>Inspect the following:<\/p>\n<\/li>\n<ul type=\"square\">\n<li>\n<p>Vacuum leakage<\/p>\n<\/li>\n<li>\n<p>Spark plug loose<\/p>\n<\/li>\n<li>\n<p>Intake-air system leakage<\/p>\n<\/li>\n<\/ul>\n<\/ul>\n<ul type=\"disc\">\n<li>\n<p>Is there any malfunction?<\/p>\n<\/li>\n<\/ul>\n<\/td>\n<td valign=\"top\" align=\"center\" cellspacing=\"\" rowspan=\"\" colspan=\"NaN\">\n<p>Yes<\/p>\n<\/td>\n<td valign=\"top\" align=\"left\" cellspacing=\"\" rowspan=\"\" colspan=\"NaN\">\n<p>Repair or replace the malfunctioning part according to the inspection results.<\/p>\n<\/td>\n<\/tr>\n<tr valign=\"\" align=\"\" cellspacing=\"\" rowspan=\"\">\n<td valign=\"top\" align=\"center\" cellspacing=\"\" rowspan=\"\" colspan=\"NaN\">\n<p>No<\/p>\n<\/td>\n<td valign=\"top\" align=\"left\" cellspacing=\"\" rowspan=\"\" colspan=\"NaN\">\n<p>Go to Step 9.<\/p>\n<\/td>\n<\/tr>\n<tr valign=\"\" align=\"\" cellspacing=\"\" rowspan=\"\">\n<td valign=\"top\" align=\"center\" cellspacing=\"\" rowspan=\"2\" colspan=\"NaN\">\n<p>6<\/p>\n<\/td>\n<td valign=\"top\" align=\"left\" cellspacing=\"\" rowspan=\"2\" colspan=\"NaN\">\n                  <b>VERIFY IF THERE IS CLATTERING SOUND<\/b><\/p>\n<ul type=\"disc\">\n<li>\n<p>Inspect the location of rattle for loose parts.<\/p>\n<\/li>\n<li>\n<p>Is there any malfunction?<\/p>\n<\/li>\n<\/ul>\n<\/td>\n<td valign=\"top\" align=\"center\" cellspacing=\"\" rowspan=\"\" colspan=\"NaN\">\n<p>Yes<\/p>\n<\/td>\n<td valign=\"top\" align=\"left\" cellspacing=\"\" rowspan=\"\" colspan=\"NaN\">\n<p>Repair or replace the malfunctioning part according to the inspection results.<\/p>\n<\/td>\n<\/tr>\n<tr valign=\"\" align=\"\" cellspacing=\"\" rowspan=\"\">\n<td valign=\"top\" align=\"center\" cellspacing=\"\" rowspan=\"\" colspan=\"NaN\">\n<p>No<\/p>\n<\/td>\n<td valign=\"top\" align=\"left\" cellspacing=\"\" rowspan=\"\" colspan=\"NaN\">\n<p>Go to Step 9.<\/p>\n<\/td>\n<\/tr>\n<tr valign=\"\" align=\"\" cellspacing=\"\" rowspan=\"\">\n<td valign=\"top\" align=\"center\" cellspacing=\"\" rowspan=\"2\" colspan=\"NaN\">\n<p>7<\/p>\n<\/td>\n<td valign=\"top\" align=\"left\" cellspacing=\"\" rowspan=\"2\" colspan=\"NaN\">\n                  <b>VERIFY IF THERE IS LIGHTLY TAPPING OR RUMBLING SOUND<\/b><\/p>\n<ul type=\"disc\">\n<li>\n<p>Inspect the following:<\/p>\n<\/li>\n<ul type=\"square\">\n<li>\n<p>Exhaust system installation condition<\/p>\n<\/li>\n<li>\n<p>Intake system installation condition<\/p>\n<\/li>\n<\/ul>\n<\/ul>\n<ul type=\"disc\">\n<li>\n<p>Is there any malfunction?<\/p>\n<\/li>\n<\/ul>\n<\/td>\n<td valign=\"top\" align=\"center\" cellspacing=\"\" rowspan=\"\" colspan=\"NaN\">\n<p>Yes<\/p>\n<\/td>\n<td valign=\"top\" align=\"left\" cellspacing=\"\" rowspan=\"\" colspan=\"NaN\">\n<p>Repair or replace the malfunctioning part according to the inspection results.<\/p>\n<\/td>\n<\/tr>\n<tr valign=\"\" align=\"\" cellspacing=\"\" rowspan=\"\">\n<td valign=\"top\" align=\"center\" cellspacing=\"\" rowspan=\"\" colspan=\"NaN\">\n<p>No<\/p>\n<\/td>\n<td valign=\"top\" align=\"left\" cellspacing=\"\" rowspan=\"\" colspan=\"NaN\">\n<p>Go to Step 9.<\/p>\n<\/td>\n<\/tr>\n<tr valign=\"\" align=\"\" cellspacing=\"\" rowspan=\"\">\n<td valign=\"top\" align=\"center\" cellspacing=\"\" rowspan=\"2\" colspan=\"NaN\">\n<p>8<\/p>\n<\/td>\n<td valign=\"top\" align=\"left\" cellspacing=\"\" rowspan=\"2\" colspan=\"NaN\">\n                  <b>VERIFY IF THERE IS KNOCK SOUND<\/b><\/p>\n<ul type=\"disc\">\n<li>\n<p>Is knocking noise present?<\/p>\n<\/li>\n<\/ul>\n<\/td>\n<td valign=\"top\" align=\"center\" cellspacing=\"\" rowspan=\"\" colspan=\"NaN\">\n<p>Yes<\/p>\n<\/td>\n<td valign=\"top\" align=\"left\" cellspacing=\"\" rowspan=\"\" colspan=\"NaN\">\n<p>Perform the symptom troubleshooting \u201cNO.13 KNOCKING\/PINGING-ACCELERATION\/CRUISE\u201d.<\/p>\n<p>(See <a href=\"SM352672\">NO.13 KNOCKING\/PINGING-ACCELERATION\/CRUISE [SKYACTIV-G 2.0]<\/a>.)<\/p>\n<\/td>\n<\/tr>\n<tr valign=\"\" align=\"\" cellspacing=\"\" rowspan=\"\">\n<td valign=\"top\" align=\"center\" cellspacing=\"\" rowspan=\"\" colspan=\"NaN\">\n<p>No<\/p>\n<\/td>\n<td valign=\"top\" align=\"left\" cellspacing=\"\" rowspan=\"\" colspan=\"NaN\">\n<p>If noise comes from engine internal:<\/p>\n<ul type=\"disc\">\n<li>\n<p>Inspect the following:<\/p>\n<\/li>\n<ul type=\"square\">\n<li>\n<p>Timing chain<\/p>\n<\/li>\n<li>\n<p>Hydraulic lash adjuster (HLA) noise<\/p>\n<\/li>\n<li>\n<p>Electric variable valve timing actuator<\/p>\n<\/li>\n<li>\n<p>Hydraulic variable valve timing actuator<\/p>\n<\/li>\n<li>\n<p>Engine compression<\/p>\n<\/li>\n<\/ul>\n<li>\n<p>Repair or replace the malfunctioning part according to the inspection results.<\/p>\n<\/li>\n<\/ul>\n<\/td>\n<\/tr>\n<tr valign=\"\" align=\"\" cellspacing=\"\" rowspan=\"\">\n<td valign=\"top\" align=\"center\" cellspacing=\"\" rowspan=\"\" colspan=\"NaN\">\n<p>9<\/p>\n<\/td>\n<td valign=\"top\" align=\"left\" cellspacing=\"\" rowspan=\"\" colspan=\"3\">\n<p>Verify the test results.<\/p>\n<ul type=\"disc\">\n<li>\n<p>If normal, return to the diagnostic index to service any additional symptoms.<\/p>\n<p>(See <a href=\"SM352646\">SYMPTOM DIAGNOSTIC INDEX [SKYACTIV-G 2.0]<\/a>.)<\/p>\n<\/li>\n<li>\n<p>If the malfunction remains, inspect the related Service Bulletins and\/or On-line Repair Information and perform repair or diagnosis.<\/p>\n<\/li>\n<ul type=\"square\">\n<li>\n<p>If the vehicle is repaired, troubleshooting is completed.<\/p>\n<\/li>\n<li>\n<p>If the vehicle is not repaired or additional diagnostic information is not available, reprogram the PCM if a later calibration is available. Retest.<\/p>\n<\/li>\n<\/ul>\n<\/ul>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\n          <a class=\"prevPage\" href=\"SM352663\">&lt; Previous<\/a> <a class=\"nextPage\" href=\"SM352665\">Next &gt;<\/a><\/p>\n<div align=\"right\">\n            <a href=\"\"#\">Back to Top<\/a>\n          <\/div>\n<div align=\"center\">\n            <em>\u00a9 2014 Mazda North American Operations, U.S.A.<\/em>\n          <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>&lt; Previous Next &gt; 2016 &#8211; MX-5 &#8211; Engine NO.21 ENGINE NOISE [SKYACTIV-G 2.0] 21 ENGINE NOISE DESCRIPTION Engine noise from under hood. POSSIBLE CAUSE Buzzing sound is heard from exhaust pipe during cold engine start: NOTE: During a cold engine start, sound occurs for up to approx. 30 s with fast idle up for a drive-by-wire control and the warm-up promotion spark retard correction for ignition timing control. Sound occurs from drive-by-wire control, ignition [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"class_list":["post-8997","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.hexorcism.com\/16ND\/wp-json\/wp\/v2\/pages\/8997","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.hexorcism.com\/16ND\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.hexorcism.com\/16ND\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.hexorcism.com\/16ND\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.hexorcism.com\/16ND\/wp-json\/wp\/v2\/comments?post=8997"}],"version-history":[{"count":0,"href":"https:\/\/www.hexorcism.com\/16ND\/wp-json\/wp\/v2\/pages\/8997\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.hexorcism.com\/16ND\/wp-json\/wp\/v2\/media?parent=8997"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}