Need some help please...

I just had to replace a coil pack on my 2001 XLT 4.6 and when checking
the plugs discovered that they were toast - heavily worn and rounded.
They were only in the truck for 5K/2 years.

You can see that I don't put a lot of miles on the truck, but I don't think
that should be a factor. A friend suggested that they got fried when the
coil pack went.

Any other ideas on what would lead to such a short lifespan?

Thanks.

 

what brand of plug???

 

Motorcraft.

 

Have you done any mods that would make it run lean? Also, worn plugs causes stress on the coils and can shorten their life.

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Other than a K&N air filter, everything under the hood is factory.

 

The drop in filter or full CAI?

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K&N's do not filter well and the oil can foul the MAF. I'd bet that if you pulled the intake tube off, you may find a lot of dust in it that got past the filter. That dust can be abrasive.

 

did you use the right plug for the application....if too hot of a plug is used the premature wear can happen, also vacuum leaks can lead to premature wear...

 

It's rained here today, but I'll take a look at that tomorrow. It's just the drop-in filter.



As for plugs, I've always used OEM standard plugs.

 

Lean mix is hard on plugs and tops of pistons. Pitch the K&N and double check.

 

I think that's a good idea.

And that way I know that everything under the hood is standard.