Well those that saw my dyno noticed I had a big power fall off over 7000rpm. Since my plugs were replaced at 56,000, I have 64000 now, I figured best bet was the coils were starting to go. They get limited airflow down there, so they tend to melt overtime leading to rough idle, loss of peak power, misfires, etc.

I just put on 4 new coils today ($32cdn through onlinemazdapoarts.com) and big time improvement (at least in my head).

They easiest way to tell if they are going is just pull them off and look at the bottom. On the bottom of all my coils, the part that sits against the mounting plate, you could see the damage. The 2 front ones were a nickle sized spot, the 2 rear coils hafd a quarter sized spot. The black metal had burned off and turned white and bubbly looking.

Now the car runs smoother, idles consistently and seems stronger up top.

Juergen

It's a good $100 Mod :D: Shame that they don't last a bit longer...but at least they aren't $250 a coil.......

I just changed out the coils and plugs....made a big difference in the idle and the smoothness up top.

Mine arrive this week - my car is running great already but I figured with all the track days I'm having lately that I should just get a new set anyway.

The new plug/coils and the HKS DLI...resulted in my first hard track day WITHOUT a misfire CEL


I still think it's a shame that the stock ignition craps out so easily :(

where do u get the HKS coil......................dannobre?

Let me know thanks.

Uh its HKS Distributorless Ignition(DLI) if you read it again

are they hard to change, or should this be done my a mechanic of sorts

There are 4 bolts ( 10mm) and 4 weatherpack plugs to remove. You have to remove the plug wires as well.....

You need to remove the rubber bellows from the intake ......another couple of bolts

All in all....about 20 min of relatively easy work....

Yeah it doesn't take long at all. It took me about 1hour total time to switch everything and test to make sure I put it back together properly. THe only part to remove is your intake piping. Then they are easy to get at.