Great guide! Good pictures! I'll be doing this this weekend, and will defiantly be using this guide.

 

I hope I am not going to get flamed for this post. My questions are regarding the attached picture.

Can I unscrew the screw with red arrow to remove the box marked with blue arrow to get some room to reach coils? (what is that box)

If still I do not have enough room can I unscrew the ones marked with green arrow to remove the accordion tube?

In both cases is there a washer in between that needs to be replaced once I unscrew it and opened it? When I am putting it back how much I should tighten them?

lastly what type of tie is the one marked with orange circle? If there is a vacuum line that needs to come out and have that type of ties how can I loosen and tighten it?

Thanks.

 

If i remember correctly, the blue one is just an airbox. You can disassemble any part there as long as you can put them back together but the easier thing is to remove the whole accordion tube and put it aside. The orange tie you just need pliers to loosen them but it still takes a bit of effort to pull the hoses off.

 

Khaf- The green arrows are pointing to the clamps for the accordion tube.
Just unscrew it a few time until the clamp is free.

The blue arrow is pointing to the resonance chamber... its used for noise reduction.
Loosening the clamp (red arrow) will allow you to take that off, but the accordion tube is still in the way from reaching the coil's electrical connection, so why bother taking the chamber off?

 

You can see my pics and what I removed here:

http://koczarski.com/RX8/Mods/BHRcoils/Coils.htm

 

Thank you all, Adam you have very nice pictures. One question, I see that you removed couple of vacuum lines from your accordion tube. Did you simply pull them out and at the end push them back in? It's not going to leak later?

 

nice pics for reference. just finished this a few minutes ago...beer of choice: Alaskan Amber. however i failed in the area of beer management for i accidentally kicked it over once in the process. it looks like you had MUCH more clearance than me, probably due to the K&N setup rather than the stock airbox which i just dismounted and pushed off to the side. also there was a wire bundle in the area i had to work around, kind of annoying but whatever. still got the job done.

 

Thx ya'll I did coil swap with Oreilly BWD E1001 ($40 ea). It did have the B revision mazda part number. Runs a hell of a lot better. Looks like the original coils & plugs on it, with brand new warranty engine. Suspect former owner was told to do ignition job and sold vehilce.

 

I want to thank everyone who contributed to this DIY specially OP.

 

you are most certainly welcome

 

I ended up paying the dealer $100 to change the plug. They got it out and determined it was the factory plug. One of the threads on the plug looked folded over so they "chased" out the threads in the head before installing the new plug. The mechanic was confident I shouldn't have any trouble with it. I was fearing the worst, but it all turned out OK in the end.....

The car is still running GREAT with the BHR coils!!

 

just swapped my coils(didnt use diy just leaving note for stock airbox owners but for my 40 of choice would have to be king cobra)

and a note for all those with stock airboxes you dont need to remove it to do this.
just remove the noise dampening box by loosening the screw that attaches it and you can easily reach the coils with a proper extension.

this does include people with big hands like me should have plenty of room .

 

So my car has been running a little "off" ever since getting it back from the dealer. There was a barely noticeable stumble at low RPMs just as the accelerator was starting to depress. I was thinking maybe they knocked a plug wire loose when they were replacing the one plug. I checked them a week ago and they were fine. So last night a gave the engine another look over and found they never tightened the clamp on the air tube from the filter box to the engine! Tightened it up last night and was pleasantly surprised this morning on the drive to work. The hesitation was gone and everything felt normal again! I was pretty surprised that this could make a noticeable difference. The rubber joint on the tube fits pretty snug even without the clamp tightened. I guess <some> air was leaking though and affecting performance??

 

In for write up! Good job!!!

 

thank you

 

Thanks for the DIY. I did the lazy way and just removed the noise dampening box (as marcx987 mentioned). Lost a couple of skin but end result was the most important

 

 

I just replaced two IG coils at dealer and it looks so simple. Then again I didn't exactly know what was wrong when my RX-8 sounded horrible one morning so wouldn't have known what to look for. The dealer charged me $300 parts and labor. I figure this is breakdown.

(2) IG coils - $75 each ($20 - $25 price mark up)
Actual service technician pay for job done - $25
Service Manager time in berating technician, screwing job up somehow then having same technician fix manager's screw up - $200
-----------------------------------------------------------------------
Total: $300.00

 

that sounds about right...and only 2 were replaced? thats horrible, you wouldve saved your self time and money + you could've had ALL 4 replace if you did it yourself, the job only takes about 25 minutes

 

I will be doing the next ones and I will also be coming to this forum for other issues. I just did the A/C temp **** fix that is posted in this forum and it worked great. Saved me $250.

Love this site
Decclan

 

 

Great DIY, changed my coils and plugs this afternoon.

Still got the rough idle but it's certainly improved..... guess I need to get the TSB motor mount checked at Mazda.....

 

I was going to pay a boatload of money for someone to do a tuneup on my 04 but this guy makes it look to easy. Well done sir...

 

Great DIY. Instead of taking out the full stock airbox, I just removed the rubber piece inbetween MAF and filter box. After that it was easy access. Don't forget the new castle I had with me.

 

Nice one dozer, did this a few weeks ago finally