Dual ground electrode spark plugs - Toyota Yaris Forums

TheSilkySmooth · 02-09-2009, 12:08 PM

A lot of this plug non-sense is from aircraft ignition problems and Failsafe engineering. Many non-injected aircraft engines have a lean-rich mixture controller with exhaust heat readout and if you run a lean condition too long you may end up toasting a plug and then toasting yourself a few minutes later (the fall isnt bad its the pavement that hurts the most). The electrode redundancy is to keep you flying ( or on boats to get you to shore) . OTW the less crap shrouding the centre electrode the lower the misfire rate.

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02-09-2009, 12:08 PM	#1
TheSilkySmooth Drives: 08 3DR 5M Bayou Blue; 09 Fos Join Date: Oct 2008 Location: New Hampshire Posts: 622	A lot of this plug non-sense is from aircraft ignition problems and Failsafe engineering. Many non-injected aircraft engines have a lean-rich mixture controller with exhaust heat readout and if you run a lean condition too long you may end up toasting a plug and then toasting yourself a few minutes later (the fall isnt bad its the pavement that hurts the most). The electrode redundancy is to keep you flying ( or on boats to get you to shore) . OTW the less crap shrouding the centre electrode the lower the misfire rate.