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Cobra Forums
2013-14 Shelby GT500
No Misfires - Finally
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<blockquote data-quote="SteveWK" data-source="post: 16168173" data-attributes="member: 139323"><p>The short story is ... haha</p><p></p><p>Read these links for the long history on this problem and what I tried to solve the problem:</p><p></p><p><a href="https://www.svtperformance.com/threads/bad-rear-o2-sensors-misfire-code.1159876/#post-15912004" target="_blank">https://www.svtperformance.com/threads/bad-rear-o2-sensors-misfire-code.1159876/#post-15912004</a></p><p></p><p><a href="https://www.svtperformance.com/threads/need-help.1166648/#post-16047599" target="_blank">https://www.svtperformance.com/threads/need-help.1166648/#post-16047599</a></p><p></p><p>The crank balancer bolt was loose. Seems like an obvious thing to check in hindsight, but you had to be there <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" />. The stock balancer is back on the car. I had an ATI +10% on it before. The loose bolt caused the balancer to scuff the crank trigger wheel. I didn't see it in person, but I do have pictures of the ATI balancer, see below. </p><p></p><p>Why did the bolt back out??? Seems odd to me. I have read of similar problems with aftermarket balancer installs. I can't remember the user's name exactly, but I think it was Lexus something. His post is what tipped me off on checking the balancer. </p><p></p><p>Steve</p></blockquote><p></p>
[QUOTE="SteveWK, post: 16168173, member: 139323"] The short story is ... haha Read these links for the long history on this problem and what I tried to solve the problem: [URL]https://www.svtperformance.com/threads/bad-rear-o2-sensors-misfire-code.1159876/#post-15912004[/URL] [URL]https://www.svtperformance.com/threads/need-help.1166648/#post-16047599[/URL] The crank balancer bolt was loose. Seems like an obvious thing to check in hindsight, but you had to be there :). The stock balancer is back on the car. I had an ATI +10% on it before. The loose bolt caused the balancer to scuff the crank trigger wheel. I didn't see it in person, but I do have pictures of the ATI balancer, see below. Why did the bolt back out??? Seems odd to me. I have read of similar problems with aftermarket balancer installs. I can't remember the user's name exactly, but I think it was Lexus something. His post is what tipped me off on checking the balancer. Steve [/QUOTE]
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2013-14 Shelby GT500
No Misfires - Finally
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