Coil wires
Thread Starter
Racer
Joined: Jan 2007
Posts: 462
Likes: 3
From: Plainview New York
Coil wires
I've seen a lot of posts where coil/spark plug wires are popping off causing various messages and check engine light and obvious rough running. Any ideas on the root cause (wire itself, vibration, heat) it seems to me that this has been more than a coincidence of a common issue?
Thread Starter
Racer
Joined: Jan 2007
Posts: 462
Likes: 3
From: Plainview New York
Burning Brakes
Joined: Jun 2012
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From: Severn Maryland
Burning Brakes
Joined: Jun 2012
Posts: 784
Likes: 37
From: Severn Maryland
Burning Brakes
Joined: Jun 2012
Posts: 784
Likes: 37
From: Severn Maryland
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Burning Brakes
Joined: Jun 2012
Posts: 784
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From: Severn Maryland
Mine happened at the coil. I purchased the car a couple months ago with 450 miles on it. It was practically new so no engine wiping on my end. I will check them periodically though from now on. Heading to the dealer end of the week so I'll get them to check them since I still have some warranty left. No problems since re-attaching the wire.
Melting Slicks
Joined: Aug 2000
Posts: 2,327
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From: Sacramento CA
When you install a plug wire on the plug or into the coil pack you get a definite click when it is properly inserted. I have never seen one come loose when the wire is pushed "Home" properly..
Melting Slicks
Joined: Apr 2013
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Weirdest thing about it was, It was completely fine when I parked it. No lights, no messages. Came out of the store in 15 minutes and started the car. Ran like crap and the messages and light lit up.
It was hot out and mid-afternoon, so I would guess heat along with trapped air in the boot, plus maybe not on all the way when assembled. Can't say for sure.
Le Mans Master
Joined: Dec 2012
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2015 C6 of the Year Finalist
Based on all the reading I've done as concerns this subject, this scenario does not seem to occur when the wire is properly "seated", on both ends.
I purchased my car new, with 3 miles on the clock.
I now have 7,800 miles, and have never experienced this issue, nor have I touched the wires.
It does seem to be a factory issue, effecting some engines, and not others.
Race Director
Joined: Jan 2011
Posts: 11,973
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From: Tonawanda New York
I also add a dab of dielectric grease in the boot ends. Checking your plug wires is common sense,like putting gas in your car. IMO
Le Mans Master
Joined: Dec 2012
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Don, I would respectfully disagree. Plugs are something's I would never consider checking. Fluids etc, maybe, but I largely rely on nanny indicators and gauges. That said my wires have come off TWICE on my 13 auto GS. I blame shoddy assembly and a crummy dealership. I would assume GM really don't care too much as quality control has never been their forte.
Thread Starter
Racer
Joined: Jan 2007
Posts: 462
Likes: 3
From: Plainview New York
Coil end, and I never touched, removed or wiped anything. I bought it new with 2 miles, It didn't happen till around 3500-4000 miles on the car. Now at 8500 and not a single other one or that one has popped off since.
Weirdest thing about it was, It was completely fine when I parked it. No lights, no messages. Came out of the store in 15 minutes and started the car. Ran like crap and the messages and light lit up.
It was hot out and mid-afternoon, so I would guess heat along with trapped air in the boot, plus maybe not on all the way when assembled. Can't say for sure.
Weirdest thing about it was, It was completely fine when I parked it. No lights, no messages. Came out of the store in 15 minutes and started the car. Ran like crap and the messages and light lit up.
It was hot out and mid-afternoon, so I would guess heat along with trapped air in the boot, plus maybe not on all the way when assembled. Can't say for sure.