2013 427 Plug Wires Fall Off

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Dec 10, 2020 | 06:01 PM

tomringo

Thread Starter

Burning Brakes

Joined: Aug 2010

Posts: 1,060

Likes: 85

From: Richmond VA Everyone should have a VetteGuard

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

Dec 10, 2020 | 09:45 PM

Todds427

Burning Brakes

Joined: Nov 2011

Posts: 1,030

Likes: 54

From: Chandler, AZ

St. Jude Donor '12

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.

Dec 10, 2020 | 10:13 PM

gsflyer2011

Drifting

Joined: Jul 2011

Posts: 1,821

Likes: 442

From: Boca Raton Florida

Quote:

Originally Posted by tomringo

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.

Dec 11, 2020 | 05:52 AM

Spaceme1117

Safety Car

Joined: May 2016

Posts: 4,626

Likes: 1,815

From: Erlanger, Kentucky

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.

Dec 11, 2020 | 12:17 PM

old motorhead

Le Mans Master

Joined: Dec 2005

Posts: 6,995

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From: Southeast TX

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.

Dec 11, 2020 | 04:14 PM

tomringo

Thread Starter

Burning Brakes

Joined: Aug 2010

Posts: 1,060

Likes: 85

From: Richmond VA Everyone should have a VetteGuard

What plugs are you all using, I was planning to replace with the OEM's.

Thanks again for all the information

Dec 11, 2020 | 09:29 PM

gsflyer2011

Drifting

Joined: Jul 2011

Posts: 1,821

Likes: 442

From: Boca Raton Florida

Quote:

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.

Dec 12, 2020 | 11:42 AM

3X2

Melting Slicks

Joined: Jan 2000

Posts: 3,321

Likes: 523

From: home

I wire tie them to the coils

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Dec 12, 2020 | 02:21 PM

mikecronis

Racer

Joined: Nov 2012

Posts: 271

Likes: 20

From: Colorado Springs Colorado

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.

Dec 13, 2020 | 12:31 PM

#10

grpweld

Pro

Joined: Feb 2017

Posts: 610

Likes: 79

From: Fallbrook SanDiego county

These have worked really well for me and definitely aren't going to fall off https://www.summitracing.com/parts/SUM-887828

Dec 13, 2020 | 12:42 PM

#11

Spaceme1117

Safety Car

Joined: May 2016

Posts: 4,626

Likes: 1,815

From: Erlanger, Kentucky

Quote:

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.