1.0STP CA ENhttps://stp.com/caa779ac37_adminhttps://stp.com/ca/author/a779ac37_admin/Knock & Ping - STP CA ENrich600338<blockquote class="wp-embedded-content" data-secret="0cj5BlLqUy"><a href="https://stp.com/ca/problem-solver/knock-ping/">Knock & Ping</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://stp.com/ca/problem-solver/knock-ping/embed/#?secret=0cj5BlLqUy" width="600" height="338" title="“Knock & Ping” — STP CA EN" data-secret="0cj5BlLqUy" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script>
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https://stpcdnimage.imgix.net/ca/wp-content/uploads/sites/9/2025/04/879996_LEV_SET4_Octane-Booster-5.25oz-scaled-1.jpg?auto=format%2Ccompress25601716When you accelerate to pass a car or go up a hill, does it sound like there are marbles rolling around under your hood? Or have you noticed that your engine knocks and pings during normal driving? Knocking and pinging due to auto-ignition could be a result of combustion chamber deposits.