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New Owner SAFE Question and Answer thread

Old 04-15-2018, 12:06 PM
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My RX8 goes really slow, losing power

Hi guys i'm a owner of 2004 rx8 192 hp, and my car goes really slow last month. When i accelerate goes really slow to 6000rpm and then just like chokes and accelerate fast to limiter. I don't know what could be, so if you can help me this would be really great.
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Old 04-15-2018, 12:23 PM
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Originally Posted by Pangy996 View Post
Hi guys i'm a owner of 2004 rx8 192 hp, and my car goes really slow last month. When i accelerate goes really slow to 6000rpm and then just like chokes and accelerate fast to limiter. I don't know what could be, so if you can help me this would be really great.
Any lights on the dash? How old are the ignition coils?Any modifications? I cam think of a few causes but need more info.
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Old 04-15-2018, 01:15 PM
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Originally Posted by Loki View Post
Any lights on the dash? How old are the ignition coils?Any modifications? I cam think of a few causes but need more info.
Check engine, but with obd2 my app says secondary air injection system. I have K&N custom air filter and i don't have rear muffler on it. I don't know about ignition coils i'm owner couple months and i've been having this trouble since replacing the clutch.
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Old 04-15-2018, 01:54 PM
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Originally Posted by Pangy996 View Post

Check engine, but with obd2 my app says secondary air injection system. I have K&N custom air filter and i don't have rear muffler on it. I don't know about ignition coils i'm owner couple months and i've been having this trouble since replacing the clutch.
Ok well step one, remove the K&N hot air intake and go back to stock or AEM/Racing Beat. A number of people have experienced incorrect MAF sensor readings because of aftermarket intakes that don't straighten the airflow properly. K&N chief among them.

Secondary air injection or secondary shutter valve? Those are different things, and your symptoms sound more like that latter. Look up "SSV testing and cleaning"

Ignition coils: if you don't know, get new ones. Bad ones kill engines.

Does the car still have a functioning catalytic converter?
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Old 04-16-2018, 11:13 AM
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Originally Posted by Loki View Post
Ok well step one, remove the K&N hot air intake and go back to stock or AEM/Racing Beat. A number of people have experienced incorrect MAF sensor readings because of aftermarket intakes that don't straighten the airflow properly. K&N chief among them.

Secondary air injection or secondary shutter valve? Those are different things, and your symptoms sound more like that latter. Look up "SSV testing and cleaning"

Ignition coils: if you don't know, get new ones. Bad ones kill engines.

Does the car still have a functioning catalytic converter?
Secondary air injection, i'm sure that says. Catalytic converter it's on the car but i'don't know if it's working, maybe is plugged?
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Old 05-07-2018, 12:26 AM
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2006 Rx8 catalytic converter

Does anyone have an OEM catalytic converter that fits this car?
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Old 08-28-2018, 04:53 PM
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Smile Help buying an rx-8

I know Im new to the discussion group but I had some noob questions. I don't know how to start my own discussion group so helping would be much appreciated.
I had a friend who owned a 2005 Rx8 and I fell in love with it and helped him fix it and sell it before he went to the Naval Academy. Its been a few months now and I found another Rx8 that I was thinking of buying, fixing, and selling to make some money for college. It is a 2004 Mazda Rx-8 with 110,000 miles automatic transmission for $800. The guy said it has a cracked radiator and needs new seals in the engine (Im guessing he's talking about Apex Seals). I was wondering if it would be a good idea to buy it, replace the seals (Apex Seals?) and radiator and sell it? My girlfriends little brother is really into Rx-8's and I was thinking about selling it to him. Would it be a good buy? Thanks in advance!
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Old 08-28-2018, 05:05 PM
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This isn't the car for that kind of job. You can't just replaced apex seals like they are head gaskets or something easy. Doing a budget/backyard rebuild is an option, but if you are selling it to someone you know, I sure hope you can sleep well at night.

A new reman engine alone will cost you $3k from a dealer. You'd be hard pressed to find anyone who's willing to pay $3k for an early automatic RX-8. Those things go for dirt cheap for a reason.

Flipping an old Corolla is more profitable IMO.

Last edited by UnknownJinX; 08-28-2018 at 05:09 PM.
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Old 08-28-2018, 05:32 PM
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The 2004-2005 automatics are the lowest power, least reliable, least desirable ones. So if you have to fix one, I wouldn't pick that one.
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Old 01-17-2019, 09:11 AM
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VA Thanks

The BEST breakdown on RX 8's "need to knows" , I have only 6 more times to read and will do!!!
THANKS Billt
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Old 01-17-2019, 09:23 AM
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Early autos had a 4-port motor. Rebuilds/remans for those are actually $1000-$2000 more expensive than the 6-port motors (all MT, 2006+ AT).
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Old 01-26-2019, 10:55 PM
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New owner

Long time rotary car owner, have had 3 rx7, still own 1. I recently purchased a manual 40th anniversary with 66,400 miles on it. The car had one owner and all services done by Mazda.

I just changed the tranny lube to Redline mt90, Will be doing an oil change and the rear end with Redline 70/90, I want to flush and replace the coolant hopefully next weekend. I have some concerns but is more like paranoia, I can't hear the cooling fans come on, granted I've only driven the car hard a few times for short periods, just to stretch her legs, temp hasn't moved from 3/8s doesn't even come close to half temp, are the fans normally that quiet on low speed? I'm used to my 2nd gen rx7 clutch fan that will blow your hat off when you stick your head in the engine bay while the car is running.

Now I've looked for what coolants were recommended, Fl22 is a must , has anyone here used ravenol Fl22 coolant? I haven't checked the local Mazda dealer for OEM fl22. Ravenol can be ordered from Amazon and is concetrate.

Here's a pic of the new toy!
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