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How do I fix misfiring

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Old June 23rd, 2023, 7:16 PM
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Originally Posted by tech2
did you inspect the spark plug as mmj suggested? These years of equinox had misfires on cylinder 5 due to cracked ceramic insulator on the spark plug. this would also lead to carbon tracking on the plug wire. post a pic of the plug
not yet that is this weekends project. Going to retrace my steps to make sure everything is connected and secured correctly
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Old June 24th, 2023, 2:50 AM
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I measure coil 1&4 ( showed 10.04) 5&2(showed 9.94) and 6&3(showed 9.78) this was all under 20k ohms settings. Any ideas ?
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Old June 25th, 2023, 9:14 AM
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its a waste spark system with paired cylinders...if the coil pack was bad you would have misfires on the pair cylinder also. I have an idea...check the spark plug, spark plug wire and report back.
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Old June 27th, 2023, 7:12 PM
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So cylinder number 5 plug was loose not tight. I have checked gap on all but 2 and gap are fine. Wil have to get new set of wires bc old boots tore on me.


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Old June 28th, 2023, 8:41 AM
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under the tape...check the insulator
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Old June 28th, 2023, 10:28 AM
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How do I do that?
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Old June 28th, 2023, 11:32 PM
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ap4uo6...at this point; replace the spark plug and wire for cylinder 5. if the misfire is gone yr good...if its still there you have ruled out a bad plug and wire.
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Old June 29th, 2023, 5:53 AM
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very true....replace the plug..any recommendations on wire set brand replacements due to 2 of the boots tore on me?

thanks
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Old June 30th, 2023, 8:10 PM
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I meant to ask recommendation on brand of spark plug wires and spark plugs to replace what I have in the engine. Thanks
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Old June 30th, 2023, 10:56 PM
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ac delco for plugs
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