How do I fix misfiring

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Jun 23, 2023 | 7:16 PM

#31

ap4u06

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Quote:

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

Jun 24, 2023 | 2:50 AM

#32

ap4u06

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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 ?

Jun 25, 2023 | 9:14 AM

#33

tech2

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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.

Jun 27, 2023 | 7:12 PM

#34

ap4u06

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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.

Jun 28, 2023 | 8:41 AM

#35

tech2

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under the tape...check the insulator

Jun 28, 2023 | 10:28 AM

#36

ap4u06

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How do I do that?

Jun 28, 2023 | 11:32 PM

#37

tech2

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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.