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Jeep Wrangler JK
JK General Discussion
Jscan - Cylinder Fuel test / compression test
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<blockquote data-quote="Dirty Dog" data-source="post: 454465" data-attributes="member: 24042"><p>You cannot measure cylinder compression without inserting a compression gauge. </p><p></p><p>However, a scan tool can check for variations in the cranking speed of the cylinder on the compression stroke. This correlates very closely with the results of a compression gauge, since poor compression will result in a more rapid compression stroke.</p><p></p><p>I do not know JScan well enough to know if it has this ability, but it is certainly possible.</p></blockquote><p></p>
[QUOTE="Dirty Dog, post: 454465, member: 24042"] You cannot measure cylinder compression without inserting a compression gauge. However, a scan tool can check for variations in the cranking speed of the cylinder on the compression stroke. This correlates very closely with the results of a compression gauge, since poor compression will result in a more rapid compression stroke. I do not know JScan well enough to know if it has this ability, but it is certainly possible. [/QUOTE]
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Jeep Wrangler JK
JK General Discussion
Jscan - Cylinder Fuel test / compression test
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