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Old 02-14-2018, 12:53 PM   #24
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Join Date: Aug 2016
Location: Lake Forest, CA
Posts: 1,957
Re: Sudden idle problem

Originally Posted by geezer#99 View Post
You cracked a sparkplug!
That is a great call, or you messed up a plug wire.

Grab each plug wire (while the engine is running) till you get shocked, then that is the problem cylinder.

Actually, disconnect and reconnect each plug wire at the plug using insulated pliers. When you pull one off and the idle doesn't get crappier, that's the one with the bad plug or wire.
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