Aftermarket Ignition leads onto stock coils shouldn't effect the coils as your only transferring the existing spark plug voltage through a lower restistance set of leads.

If you attach the popular HKS-twin power ignition amplifier then the increased primary voltage that results in a vastly higher secondary (output) voltage means greater current flow through the coils & additional heat. heat that the tiny coils have trouble dissapating.

Remote mounting, heat sinking, ducted air across them & that may get some reliability from them.

REgards

Autozone must have "magic" coils. They want 88.95 EACH!...and yes...I emailed them to confirm that was "each" and not for all 4.

Hi, I bought RX-8 two months back and the CEL light was on display. Since I live in Pakistan there are no mazda dealers here and because there are few mazda's here I didn't had any choice and I had to take it to one and only garage.

The guy over there said that two coils are not working (coil B & D) so I chaged them. After a week I went to the track and later on that day I discovered that its showing CEL light again. I went to the garage and again two other coils were burnt but this time (coil A & C). I replaced them too and now i had all four new coils.

I've done only like 150 miles on them and yesterday it showed the CEL light again and I am quite sure that its the same coil issue.

I don't know what is wrong with the coil or is it some electrical problem with my car which is causing my coils to burn again and again
I'm using N3H1-18-100B coil and I have 03 RX-8
I've already spent like 650 $ only on coils.....please help :(

How the heck can you spend 650USD on coils? they are like $40 each!

i've bought 2 coils from UK for like 105 pounds each and 2 coils from my country for 150$ and coils are very expensive when u buy it from a mazda dealer

Ummm have you read the start of this thread about ordering from online mazda parts?

any need to clean off the plate under the coils?

I agree, I need to replace mine and the freaking Mazda dealer told me that will be $321.96 for the spark plugs and $465.00 for the coils plus $195.00 for engine decarb and $129.95 for the throttle body cleaning. So in total is $1,111.91 without tax.

I told them "you better put a gun in my head if you want to assault me". So I took my car back and now looking for doing myself. So any suggestion will be appreciate.

If you clean off the plate & drill holes in it, then circulating air around the engine bay will assist in cooling this plate further.

The Series-II (08-10) had a minor solution where Mazda made a track along the plate to create an air gap allowing the circulating air to run down the plate & assist in cooling.

Either method reaps the same results. The cooler the coils, the longer they last.

REgards