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Mazda RX-8 Problems and Solutions



  • trispectrispec Posts: 305
    Yep. I called up Jon Etheridge from the Car and Driver article . He said they were still gathering the various pieces needed for the kit from all over the country and world.

    Pathstar posted enough cautions for me to wait and see, although the low end and midrange 80% torque increase looks mighty fine. Fine enough to think about some of those super wide tires.
  • grinningrinnin Posts: 13
    I frequently do the same thing trispec. Rev to 3000-3500 for a few seconds and kill the engine as the revs wind down. My dad had a 79 RX-7 when I was a kid (one of the first two shipped to Milwaukee) and he always did the same thing with that car. I have not had a single starting issue here in New England with my 2004 6-sp.
  • I just bought a rx8 and it seems to have really squeaky brakes it only has 4000 miles on it but i think someone may have scraped a curb real good judging by the look of the rims! I also seem to hear a rattle but unsure of where it is comong from...did you ever solve the question?
  • trispectrispec Posts: 305
    Break squeak is normal, but there is a service procedure that supposedly fixes it.

    As for the gurgle/popcorn/rattle sound that I still hear at lower RPM ranges when accelerating, I've concluded that it's part of the exhaust systems explosive detonation of the remaining gases as left over from the engine.

    I've only registered the issue with Mazda as there are no other problems like check engine lite, loss of power or engine roughness.

    The noise seems to be less and less noticed however and so hopefully, it's just a continuing break in issue, like the limited slip differential vibration. Do you have the limited slip differential issue?
  • pathstar1pathstar1 Posts: 1,015
    Brake noise is caused by hard pads (performance type usually). The Mazda RX-8 pads are known for this. They have new pads that are supposed to be quieter, and they -may- change them for you under warrenty.

    If the rims were damaged, check the tire sidewalls carefully. If there is evidence of damage on the sidewalls, I'd be tempted to have the tire pulled off the rim and inspected internally. It is possible to damage a tire sidewall by scraping it hard on a curb - and you don't want it blowing out at 75+ MPH! If there is no damage evident on the sidewalls then the tires are probably ok.

    The exhaust can cause rattles - the most common cause is loose heat shields. I've even seen gravel between the heat shield and the exhaust pipe cause rattling.
  • trispectrispec Posts: 305
    Wow, totally missed that he was asking about a real rattle. Funny though, I remember the heat shield on my '87 RX-7 rattled.
  • fishnhardfishnhard Posts: 20
    Hi again all,
    Yes the brake squeak can be fixed under warranty. There is an updated brake pad and shim kit that Mazda has out. It fixed mine. As far as my rattle noise, mine has still to be fixed. I have had the computer removed and re calibrated and flashed. Still have the rattle, even changed fuel brand as per the tech line request. No change. Mine goes back in again on July 3rd. If this doesn't fix it then I will be talking to the Mazda regional manager of my area about them replacing the car.
    In fact I was out car shoping yesterday, the most any dealer will give me for an 05 RX-8 sport with 7200 miles is 19,000. That was even from Mazda. The retail is 25,000+.
  • trispectrispec Posts: 305
    Ouch. But I thought there was a noticed performance increase for your RX-8 AT after the rebuild on your PCM.

    I still hear the gurgle/popcorn/rattle but only after the car has warmed up. I believe there is less of the noise as well, but I could be less sensitive to hearing it at this point.

    PathStar seems fairly sure that's the normal explosive exhaust burning up left over gas. My gas millage is unchanged.

    I have registered the issue with Mazda USA.
  • lhesslhess Posts: 379
    i just got my squeaky brakes fixed. I mentioned it in the service dept at the Mazda place when i was in for an oil change. they told me my brakes were fine and showing normal wear = no problems.

    When I got home to the internet, I looked up the TSB's for the car and saw there was one. I called them back and told them there was a TSB for squeaky brakes and they ordered me a new brake kit immediately. I still have a squeak from time to time (not nearly as bad as the squeeling demon sound they were making), but I'm satisfied with the fix.

    Those TSB's were listed on a Mazda dealer website and I'll be happy to post a link here if I can find it again.

    PS Both front sway bar links were also popped out of socket and they fixed those during the bake job.
  • lhesslhess Posts: 379
    hope this isn't a repost or against the rules here, but here's the site where I got my info:
  • northfootnorthfoot Posts: 7
    My RX8 (2005, purchased in June of that year) had been running fine until one week ago. At that time (warm weather and warmed up engine) the engine warning light came on, and shortly after this, the car stalled out whenever I tried to accelerate. Car has been at dealer for 1 week. First, spark plugs were replaced to a hotter burning version. Also the car’s computer was flashed. No improvement. Now, the dealership thinks it may be the ignition coils, which need replacing. Any ideas as to if they are on the right track?
  • xfree143xfree143 Posts: 1
    I parked my RX8 (2005)last night and today it will not start. It turns over but acts like it has no fire at all. I will have to towed to the dealer Monday but does anyone have any ideas? Is this a common problem? :mad: :sick:
  • pathstar1pathstar1 Posts: 1,015
    The ignition coils can fail. In hot weather they can actually go into thermal runaway. Ask the dealer to show you the ones they removed. If you see any bulging/cracking they are suspect. They have a transistor inside as well as the coil and poor heatsinking. Should be warrenty.
  • pathstar1pathstar1 Posts: 1,015
    Sounds like it was flooded. There are two possible ways to get it started.

    First, hold the accel. pedal to the floor and crank the engine, 10 sec. cranking, 30 sec. cool down. Do not release the accel. pedal until it starts to fire! Holding the accel. pedal to the floor shuts off the fuel injectors so you don't add even more fuel to a flooded engine. It usually takes up to five minutes of this to get it started. You may need to recharge the battery if it was flooded too badly. Note that once it starts it will smoke a bit due to the excess fuel inside the engine. DO NOT shut it off until it warms up!

    If this doesn't work and if you are a little mechanically inclined, remove the spark plugs (note which location each was removed from - there are two different types and you want to put them back in the same location - leading and trailing plugs). Inject a squirt of oil into the front and rear rotor housings leaving the plugs out. Turn over the motor - this will eject some oil and fuel (hold the accel. pedal to the floor so it will not inject any more fuel into the engine). Once you've done this, you can reinstall the plugs (check them to see if they are clean and clean them if not - if they were soaked with fuel they need to be cleaned or replaced). Then you can start the engine (do not touch the accel. pedal). Note that it will smoke a bit from the excess fuel and oil inside so don't panic. Don't shut it off until it warms up.

    It is still possible to flood an RX-8 but it has become less common these days with the newer flash in the PCM. You should always let the engine warm up before shutting it off (wait until the temp gauge starts to move off the lower peg).
  • fishnhardfishnhard Posts: 20
    Ok all we got out car back from the dealer yet again. Now the tech line is saying that the rattle/popcorn noise is a normal condition. My wife drove another 05 A/T which is the same as ours and it did as well, but was about 1/4 of what ours is doing. I know a few guys that have M/T and they dont have this noise. I am thinking that they dont know what it is so they are now at the point of well must be normal. I have had the computer undated now twice in under 2 months, changed fuel brand, and still it rattles. It got worse after the first flash so we will see. :confuse:
  • trispectrispec Posts: 305
    The many popcorn/rattle conversations we've had with helpful folks here, especially PathStar, have built my confidence that the condition is normal. The popcorn/rattle is there, but much less than before. I use to be able to hear the noise in the cab with the windows rolled just sitting in the drive way after a cold start. Now I'm only able to hear it with the windows rolled down, after the engine has been completely warmed up under a strong take off.

    My 2005 RX-8 AT has 13K miles. She appears to be burning the same amount of gas (13.5 city/23 highway), but oil consumption seems to be less. Driving around in the heat of summer for the first time, seems to really be breaking in the engine and tranny much more than the previous cooler fall, winter and spring temps. The engine seems much livelier, idles smoother, and the Lim Slip Dif vibrates less on corner take offs.
  • heenoheeno Posts: 7
    As a owner of 93 I'm considering a new 2006 RX8, 6 speed. Anything I should know about t his car, any packages or options I should consider or stay away from. Thanks
  • nucmednucmed Posts: 2
    :sick: I purchased a 2004 Mazda RX8 in March of 05. I hadn't had any major problems with it until about a month ago. As I was driving down the highway, the car wouldn't accelerate. When I proceeded to get of the highway, I took it out of gear to downshift and the car shut off. The vehicle was towed to the dealer, and they said it was a program that needed to be downloaded. So apparently the problem was solved. Then this past weekend it happened again. Is this a common problem? or is this an indication that i bought a :lemon: It is so frustrating, I don't know what to do. :sick:
  • pathstar1pathstar1 Posts: 1,015
    There are many possibilities re causes for this problem. The MAF connection is the first one I would check. It may have gotten wet and corroded.
  • northfootnorthfoot Posts: 7
    I just got my car back from service after repeated stalling (2 weeks repairs). Multiple services performed (hotter spark plugs, PCM flash, recalibration of eccentric shaft position plate, new plug wires, new ignition coils and new fuel pump). All this done under warranty. Point of story is many possible causes for stalling out. Many thanks to Pathstar fo his advice. Questions:
    1. Would driving at higher shift points near redline help prevent these problems, at least in part?
    2. Could using a brushless car wash have caused water to get in and cause these problems?
This discussion has been closed.