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2013 427 Plug Wires Fall Off

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Old Dec 10, 2020 | 06:01 PM
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Default 2013 427 Plug Wires Fall Off
2013 LS7 427. I had plug wire #1 fall off the coil and replaced it about 6 years ago and it never has given me another problem I recently had #3 fall off and have replaced that 2 times now. The fist time I probably broke the clip when trying to push it on. Replaced that and the new replacement has come off 3 times so far, no broken pieces. These are all OEM's. I'm considering going to something else. Has anyone had this issue and what was done to correct (and or what wires did you go to if not OEM's). I heard that some of these had issues of falling off the coils. Thanks, Tom
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Old Dec 10, 2020 | 09:45 PM
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Its a fairly common problem with these engines. Plug wires falls off and you get misfire. I would think new wires would help. Try something besides OEM wires.
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Old Dec 10, 2020 | 10:13 PM
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Originally Posted by tomringo
2013 LS7 427. I had plug wire #1 fall off the coil and replaced it about 6 years ago and it never has given me another problem I recently had #3 fall off and have replaced that 2 times now. The fist time I probably broke the clip when trying to push it on. Replaced that and the new replacement has come off 3 times so far, no broken pieces. These are all OEM's. I'm considering going to something else. Has anyone had this issue and what was done to correct (and or what wires did you go to if not OEM's). I heard that some of these had issues of falling off the coils. Thanks, Tom
Yes. Try msd wires. They have excellent connectors, will never come loose like the cheap OEM Mexico made ones. Take a look at your connectors than look at msd. Mega difference.
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Old Dec 11, 2020 | 05:52 AM
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Had this happen on my GS the day after I brought the car home. Very common.

I bought a set of Summit Racing wires and never have had this problem again.
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Old Dec 11, 2020 | 12:17 PM
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Or, if you're cheap like me, take a set of pliers and crimp the spark plug end just a bit. I've never had a "coil end" come off. After the crimp job, never had a spark plug end come off again either.
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Old Dec 11, 2020 | 04:14 PM
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What plugs are you all using, I was planning to replace with the OEM's.

Thanks again for all the information
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Old Dec 11, 2020 | 09:29 PM
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Originally Posted by old motorhead
Or, if you're cheap like me, take a set of pliers and crimp the spark plug end just a bit. I've never had a "coil end" come off. After the crimp job, never had a spark plug end come off again either.
The metal oem uses is paper thin. It even breaks all by itself. You crimp it and as soon as you slide it over the spark plug end it looses its crimp and becomes loose again.
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Old Dec 12, 2020 | 11:42 AM
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I wire tie them to the coils
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Old Dec 12, 2020 | 02:21 PM
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I bought Magnecore wires and those kept falling off too. Moved to Edelbrock's X-Fire and those are a complete shroud-kit and work great and haven't had a problem since.
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Old Dec 13, 2020 | 12:31 PM
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These have worked really well for me and definitely aren't going to fall off https://www.summitracing.com/parts/SUM-887828
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Old Dec 13, 2020 | 12:42 PM
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Originally Posted by grpweld
These have worked really well for me and definitely aren't going to fall off https://www.summitracing.com/parts/SUM-887828
I have these also. I like that the spark plug boot has a lot more surface area to grab onto. Makes plug wire removal much easier and less prone to ripping the wire out the boot.
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Old Dec 13, 2020 | 03:52 PM
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Firecore50 with the promod boots if you have headers. Best wire money can buy.
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Old Dec 21, 2020 | 07:24 PM
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I did try that with the one that kept falling off!
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