I'm new to COPs
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Junior User
Joined: Mar 2012
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From: Omaha, NE
I'm new to COPs
I have never had or worked on a vehicle that used Coil-on-Plugs. When searching on rockauto.com I saw that you could purchase a COP, which consisted of the boot and a spring. Or you could purchase the coils.
What is the difference between the coil and a COP?
What is the difference between the coil and a COP?
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Junior User
Joined: Mar 2012
Posts: 90
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From: Omaha, NE
Okay,
I'm looking through rockauto.com again and I might have answered my own question.
The first item under ignition is COP Coil Boot. This is just part of the coil, correct? Do the boots tend to go bad quicker then the upper portion a lot faster?
The other listing is for the whole ignition coil.
Any thoughts on COPs advertised for performance?
Thanks for any input.
I'm looking through rockauto.com again and I might have answered my own question.
The first item under ignition is COP Coil Boot. This is just part of the coil, correct? Do the boots tend to go bad quicker then the upper portion a lot faster?
The other listing is for the whole ignition coil.
Any thoughts on COPs advertised for performance?
Thanks for any input.
Senior User
Joined: Jul 2008
Posts: 206
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From: Minneapolis
The boots can become brittle and crack before the COP fails. This allows moisture in and leads to bad spark.
I fixed a rough running problem on my Excursion last summer by replacing the spark plugs and installing new boots. Mine were very brittle.
I fixed a rough running problem on my Excursion last summer by replacing the spark plugs and installing new boots. Mine were very brittle.
FTE Chapter Leader
Joined: Nov 2010
Posts: 30,595
Likes: 1,236
From: N. IL
Assuming you're having a miss? It's best to replace all the boots with a dab of dielectric grease (cheap) and only replace the COPs that are bad (expensive). I've replaced only 3 in the 12yrs of ownership. Don't just replace all 10.
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Junior User
Joined: Mar 2012
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From: Omaha, NE
Not having a miss yet. I have a CEL with P0720, Output Shaft Speed Sensor.
Found several threads with mention that a coil going bad can cause the P0720 CEL. Saw that ebay had 10 packs of coils for $100. Thought about changing the COPs as part of a tuneup. I would play it safe and change the Output Shaft Speed Sensor too.
Found several threads with mention that a coil going bad can cause the P0720 CEL. Saw that ebay had 10 packs of coils for $100. Thought about changing the COPs as part of a tuneup. I would play it safe and change the Output Shaft Speed Sensor too.
Cargo Master
Joined: Nov 2008
Posts: 2,332
Likes: 2
From: Summit, MS
Not having a miss yet. I have a CEL with P0720, Output Shaft Speed Sensor.
Found several threads with mention that a coil going bad can cause the P0720 CEL. Saw that ebay had 10 packs of coils for $100. Thought about changing the COPs as part of a tuneup. I would play it safe and change the Output Shaft Speed Sensor too.
Found several threads with mention that a coil going bad can cause the P0720 CEL. Saw that ebay had 10 packs of coils for $100. Thought about changing the COPs as part of a tuneup. I would play it safe and change the Output Shaft Speed Sensor too.
Coils - if it ain't broke, don't fix it.
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