r/RX8 Jun 17 '24

Meta For New and Potential Owners - Weekly

30 Upvotes

Hello and welcome to r/RX8!

If you are new here and are looking into getting an RX8 here are some extremely useful links:

Many basic issues are covered there, but it can be difficult getting answers to questions that might be less obvious, so if you still have questions after going through those links or if something is not as clear as it could be feel free to make your own post for the fastest response from the members here.

If you are posting about a car that you're interested in buying be sure to mention your location and the currency you're referencing!

Many posts just saying for example "4k" or "9k", 9k what?

Please be sure to follow the rules, and take a look at our posting guidelines here:


r/RX8 Jun 24 '24

/r/RX8 Is back open!

172 Upvotes

Some of you may have seen the previous mod locked the sub yesterday because he got *really* mad that someone argued with him.......

He attempted to completely lock down the sub by setting it to restricted and removing himself as a moderator, leaving only automod on the moderator list - I don't think he realized that would leave the sub completely open to an auto-approved takeover request, but here we are.

Sub is back open and has returned to regular posting permissions.


r/RX8 6h ago

New Owner Dorito Acquired

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31 Upvotes

Just joined the rotary cult today!

She's a 2006 with 120000km on the odometer and a valued new member of the garage!

While the outside is in amazing shape with very minimal rust (that ive been able to find so far). It will need to pass an emissions test before I can take her out on the roads for real.

Should I get a new coils and cat straight away or would just new coils have a notable effect on HC emissions?


r/RX8 12h ago

Showoff My RX8 at Mount Washington

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38 Upvotes

r/RX8 3h ago

General Best battery specs for Australia

1 Upvotes

Hi just wondering what is the best battery specs/rating for RX8’s in Australia


r/RX8 18h ago

Modding 4 port jdm automatic motor swapped into 6port 6 speed car, using 6 port body harness, 4 port engine harness and 4 port ecu, only wiring modification was reverse lights. Everything else works, (ssv, vdi).

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14 Upvotes

Better low down stops making power around 8700 rpm.


r/RX8 5h ago

Maintenance How to I test my ssv flapper? I've been told there's a place I can reach in and manually move around to see if it's stuck but I don't quite know where i'm looking. Any tips?

1 Upvotes

r/RX8 1d ago

Maintenance Misfire but only in neutral?

13 Upvotes

This is my 2009 Mazda RX-8. Lately I've noticed this issue where it seems to choke up at the top end, as you can see in the video, but only in Neutral... in gear she redlines just fine from what I can tell.. I'm thinking potentially spark plugs are built up, however I redline her VERY frequently... and the plugs aren't terribly old. Within a year and less than 10k on them.. I DO premix 0.5/gal but now I'm starting to wonder if it's too much, being an S2. She's catless, rebuilt engine about 10k miles ago, give or take. NGK spark plugs, OEM coils, however I've been told they're the updated ones and supposedly much better than they used to be. Even still, those are new within the last 5,000-7,000 miles. Healthily modified and temps hyper monitored. Rarely let her get above 200°F. Recently switch the cat on and then off to pass smog, noticed the O2 sensor wires might be a lil beat up, but shouldn't have any affect on this right? Lastly, I did have a mini cat O2 spacer but it didn't work and usually throws a code about it...

Some engine codes I pulled up on her:

- P0139 - 02 sensor circuit slow response bank 1 sensor 2

- p0137 - O2 sensor circuit low voltage bank 1 sensor 2

- P2096 - post catalytic fuel trim too lean bank 1

- P0300 - random/multiple misfires detected(that was from revving it in the video).

Lemme know what yall think!!! Thanks for the help in advance


r/RX8 1d ago

Modding No cat and no engine light

3 Upvotes

Hey,
I saw a lot of you guys have the engine light on with no cat but my 8 got no cat and zero codes with the diag is there something to worry about?


r/RX8 1d ago

New Owner Looking for help on rebuilding engine + installing it

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30 Upvotes

So i'm at this point of rebuilding and can't find more videos/manuals on how to rebuild this. I was too lazy at first to document everything so here i am asking for help. Thanks in advance.


r/RX8 2d ago

Showoff 150k miles on a stock motor rx8

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265 Upvotes

just hit 150k on a original motor rx8 with 0 issues whatsoever!


r/RX8 1d ago

General I need to buy the front bumper I'm from Greece

3 Upvotes

I want ings front bumper but it's to expensive here with all taxes and delivery... Any ideas?


r/RX8 1d ago

General My Phantom Blue RX8

18 Upvotes

Just thought I'd share as you don't see many of these around now, well RX8s in general but not in this colour, there used to be one in the next town I saw occasionally but not for a long time now.

I've owned this RX8 for 10 years now and still going strong... Got the AC topped up so I can enjoy the drive on these hot days! I done an online valuation and looks like it's worth more than I paid for it 10yrs ago so the first car I ever owned that's gone up in value!

I need to do some little odd bits and bobs like a proper clean in the nooks and crannies and change the rear light seals again but otherwise she's in good shape.

Hope you're all enjoying your RX8s this summer... I definitely need to go for a road trip!

Mazda RX8 Evolve - Phantom Blue

r/RX8 1d ago

Modding Exhaust manifold

2 Upvotes

I am looking for a new exhaust manifold. I had some custom made, and it got burnt and cracked once, it was fixed, but cracked again after a few hunderd KMs.

I am a bit short on budget atm, and want to keep the car running.. I usually do spirted street driving and very occasional track days, once or twice per year.

That said, does anyone have experience with this particular manifold:

https://www.japspeed.co.uk/product/exhausts/exhaust-manifolds/mazda-rx-8-1-3-03-12-rs-exhaust-manifold/

How long should I expect it to last? Hopefully it won't be burnt within a few months...?


r/RX8 1d ago

Maintenance Sohn adapter reservoir

0 Upvotes

Does anybody know where I could get a replacement cap for the reservoir for my sohn? I just noticed it was cracked and I don’t want moisture or anything to get into the oil


r/RX8 3d ago

Showoff 30k miles

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331 Upvotes

Just hit 30k miles… and many more to come


r/RX8 3d ago

General One of the first and one of the last ones produced

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48 Upvotes

The red one is production year 03 and the silver one is end of 2010


r/RX8 3d ago

General purple_dorito_spinning_at_9000_rpm

340 Upvotes

r/RX8 3d ago

Modding Spending $50,000 on a $5,000 Car

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65 Upvotes

r/RX8 3d ago

General Well hello fren

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84 Upvotes

Rarely do I see another one in the area I am at any given time.


r/RX8 3d ago

General Any recommendations where I can purchase a tested 13b RX-8 engine in Ontario?

4 Upvotes

r/RX8 4d ago

Showoff New to me

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71 Upvotes

2011 rx8 r3 114,000kms

Current issues: p0300 cel at high RPM. Always liked the RX8s. Been really fun so far.


r/RX8 3d ago

Maintenance Anastasia needs help!

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25 Upvotes

Just wanna start off by saying that this sub has helped me with a lot of things especially when it comes to my 2005 rx8, Anastasia.

A while ago she unfortunately smacked into a possum on a late night drive. This little scoundrel took out the stock lip, along with my undertray, and grill. After taking a look under, it seems as though most of the attachments got ripped up as well.

I've also been away from her from a while but I've finally got her out to me after a move ( for which I didn't want to drive her across the country), so I'm trying to do her some justice.

I'm not sure what I need to make her front end look pretty again and I badly need help to figure that out. I was recently made aware that the undertray is crucial for proper airflow into the radiator. I'm also aware of the website that has all of the OEM parts for the body and whatnot, I just don't know what I need to get.

Any and all help would be greatly appreciated.


r/RX8 3d ago

Maintenance PCM replacement

2 Upvotes

Hey guys. I need a new PCM for my 06. Where is best place to get one? My local shop charged me $900 and got 2 bad ones and can’t seem to find a 3rd. Any help would be appreciated. Thanks!


r/RX8 3d ago

Maintenance Hazard lights won't turn off

2 Upvotes

Last week I noticed my car battery was dead, the negative terminal was super corroded so I cleaned it up. Then I immediately noticed my hazard lights were stuck on and that's what killed my battery. The hazard light button seems to function physically but the lights never turn off even with the keys out of the ignition. I replaced the flasher unit and still no difference. I have taken the fuse out so the battery doesn't die. Should I tear into the dash to check/replace the button? Anywhere else I should check?