interesting... maybe I had a problem with my off-road box...?? how many miles have you run on a cap/rotor set?

 

I average 10,000 miles per year, but over half of those are pulling, hauling, or 4X4'ing it. Pretty rough usage and I always replace my cap and rotor annually even though I could probably go longer. It gives me a good reason to play under the hood each spring. Another thing I do is apply some di-electric grease to each of the contact points inside the cap along with the rotor/cap/coil contactwhen I install it. Maybe this is why I don't see the burn through (expanded gap) as much as you do. When I replace the cap I do still find some of that grease still attached to eachof thesepoints.

 

that's probably why you never see a problem... not enough miles on it. I ran my accell 20k before having issues, the stock mopar parts went over 30k before needing to be swapped...

 

damn, I guess I should replace mine then huh? I have about 86K on the stock ones...

 

For the cost of a new NAPA brass contact cap and rotor it's an easy expense to accept. When I am replacing them I also regap my plugs or replace them if needed. It gives me the chance to tell the wife about anything else I need. Good opportunity to add to the truck every spring.

 

keep in mind that we're (were) running msd spark boxes which eat up cap & rotors...

 

+1
Don't forget about the MSD's appetite for spark plugs also.

 

ahhh ok well I'll still replace it, can't hurt...

 

Yea, I'd say replace it after 86,000 miles. Probably get a little better MPG.

 

Man I hope so...[8D]