496 mag ho suspicious performance

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06-10-2023 | 12:13 AM

#41

Outlawmarc

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Joined: Mar 2023

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From: Canada

Quote:

Originally Posted by Velocity941

496 will idle like a kitten and run smooth on 7 cylinders. Check for spark at the plug with a spark tester. Coils go bad and spark arcs to valve cover. Won't show up in a scan... good luck 👍

i did test for detonation on each cylinder

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