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Old 19th August 2015 | 07:23
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Mach Jump
 
Joined: May 2005
Posts: 1,115
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From: Yorkshire
Having one of a pair of spark plugs inoperative will have the same effect as retarding the ignition timing.

This may cause the combustion process to continue after the exhaust valve has opened, heating up the EGT sensor.


MJ
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