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What would couse number 4 cylinder to misfire after changing plugs and wires?
Wiki User
∙ 14y ago
First thing: pull th plug and check the gap and any extreme fowling. My first question to this problem-how do you know it is the #4 plug that is mis-firing?
If you are certain it is #4, pull the plug wire, insert a spark testor or an old plug, put on a glove that is well insulated (chore gloves work well dry), have somewone crank the engine, hold plug testor or plug about 1/4" from a well-grounded nut/bolt on the engine and check for spark. If the spark is blue, the spark is good. If it is an orange/yellow, it is weak-check the colil within the distributor.
Anther way to check spark is with a spark plug wire light-i use a lisle 19380
wire light-just put the groove area of the tester on the plug wire and it will light if the spark is strong enough.
Wiki User
∙ 14y ago
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