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Spark plug wires coming off while driving?

primpickins

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primpickins Enthusiast

primpickins

Posted
Posted

This is the Second time it has happened to me. Starts idling rough, bouncing like crazy, then a ticking from the engine, the engine light flashes, traction control locks on and shifts terribly! Then I get it 45 min to the dealer for them to be baffled at how my plugs keep coming off so easily while driving. They said it seems to be a problem on only a few models and they've asked GM to look t it. Maybe get all the covers replaced? Wondering if anyone else is having his problem.

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CAtaylor Enthusiast

CAtaylor

Posted
Posted

My number 6 plug wire came off once, not since though. I live in the epitome of bad roads; Louisiana.

BaltimoreCaesar Enthusiast

BaltimoreCaesar

Posted
Posted

Are you talking about your spark plugs themselves, or the spark plug wires? If it's the wires, you just need to tweak the clips so they hold the plug better. If the plugs are actually coming out, then they simply need to be retorqued to spec. Not sure what the problem is.

LSR Mike Enthusiast

LSR Mike

Posted
Posted

gotta be the wires coming loose, when they come out of the head while driving they usually put a hole in the hood!

primpickins Enthusiast

primpickins

Posted
  • Author
Posted

sorry, spark plug wires. not the plugs :) unless someone was tampering with them! The dealership said they have found it to be a problem with a select few models and are hoping GM issues a recall and replaces. they check and tighten all of them when I go in. I live in rural Ontario so dirt roads are what i mainly use. But when the engine light flashes and traction control comes on and Onstar tells you to go to the dealership...

 

  • 8 months later...
xchief297 New Member

xchief297

Posted
Posted

I have a 2014 Sierra. I have had this happen twice now. The first time I was traveling I-95 and the front end started bucking, the check engine light came on and the traction light came on. I drove it slow to the nearest auto zone so they could plug in to it and see what was going on. The scanner said misfire in cylinder 1. I limped it to the nearest GMC dealer and being Sunday I had to stay in a hotel. Monday morning they said that the spark plug wire had come off.

A few weeks ago driving down a country road, the same thing happened. Now knowing what to look for I found a spark plug wire hanging not attached.

The dealer said it was actually common and they have been seeing it a lot.

  • 4 months later...
shaun727 Enthusiast

shaun727

Posted
Posted

I just had this happen on a back mountain road! The truck started shaking, the voltage dropped, check engine light came on and the traction control light was on. Lost ALL power in the steepest part of the mountain, 20 minutes in, in the middle of nowhere! Spark plug wire came off. NEVER had this happen on '07 Avalanche and that thing went off road ALL the time! How does a $50k All Terrain have this issue? I'm replacing all the plugs and wires. Ridiculous!

arkenzo Enthusiast

arkenzo

Posted
Posted

I just had this happen on a back mountain road! The truck started shaking, the voltage dropped, check engine light came on and the traction control light was on. Lost ALL power in the steepest part of the mountain, 20 minutes in, in the middle of nowhere! Spark plug wire came off. NEVER had this happen on '07 Avalanche and that thing went off road ALL the time! How does a $50k All Terrain have this issue? I'm replacing all the plugs and wires. Ridiculous!

It could happen to a $20,000 truck or a $90,000 truck...doesn't matter of the price, shit happens.

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