Spark Plug Boots
Laughing Gas
Joined: Oct 2005
Posts: 1,226
Likes: 42
From: The OC
They're so cheap, it wouldn't hurt. I got mine at NAPA for $4.42 and they come with the spring wire. They also give AAA discount.
Fleet Mechanic
Joined: Feb 2011
Posts: 1,812
Likes: 88
From: Thousand Oaks, CA
That's about right, the coils are a bit over half the cost.
The coils are easily tested.
Why change the coils when it's more likely the boot or the spring is the problem?
Laughing Gas
Joined: Oct 2005
Posts: 1,226
Likes: 42
From: The OC
I know, but with the P0305/0306 code the other day, I needed them NOW to zero in on the issue. It was only $9 and 30 minutes and I got my answer.
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Fleet Owner
Joined: Apr 2008
Posts: 24,316
Likes: 5,127
From: 0,0,1
I guess it depends on how much you value your free time. To me it's not worth saving the $41 to spend the time cleaning, testing, then changing the boot and spring on each of the old COPs. Then there's the possibility that even if all the COPs test good, one might be borderline not good. You could put it all back together and still end up with a misfire. But that's just me! I learned the hard way that it's okay to be penny wise, as long as you're not dollar stupid.
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Fleet Owner
Joined: Apr 2008
Posts: 24,316
Likes: 5,127
From: 0,0,1
Good I'm glad to hear it worked out for you. When I changed my COPs I kept a few known good ones, just in case I ran into a 'I need to fix it now' situation like you did.
