Newly Revised RX-8 Service Bulletins
#201
I wonder if your infrequent redlines contributed to the intake manifold replacement. Did they say you had to have the manifold replaced?
#202
How often do you go above 7-8K?
maybe once a month at best
I wonder if your infrequent redlines contributed to the intake manifold replacement?
the shift buzzer is your friend
#203
You've stumbled on to the very best way to build up carbon and have to replace an intake manifold all in one. The tertiary and VDI intake events happen at 6250 and 7500. If you are not exercising them regularly they can become stuck in place from carbon build up in short order. A 6 mile drive to work is great for keeping the commute time and gas bill down, but it's barely enough time for the car to warm all the way up.
the shift buzzer is your friend
the shift buzzer is your friend
#204
Registered Zoom Zoomer
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Don't get too hung up on this; imprecise science at best. Hit the redline when you feel the need (which for me averages once daily and dump some STP or similar fuel system cleaner in your tank every 4,000 miles or so and you'll be fine.
...and my next question is... although I redline at least once daily I have been wondering how a gentle half throttle acceleration through 1st, 2nd and 3rd up to redline is to keep the carbon out and intake valves operating vs a more aggressive almost WOT exercise. Also, does would it be beneficial to run at 8000-8500 for 10 seconds or so in 2nd or 3rd?
#205
I'm wondering whether your 'imprecise science' is based on theory, surveys from other forum members, "new engine club" member experiences, teardowns of RX8 or RX7 motors or just good ol'gut feel?
I've often wondered how many engines have been replaced or required major work if they hadbeen premixed, driven to redline once a day and maybe run oil heavier than 5w20. That would be an interesting poll. My guess is,with that combination of treatment, the number of MT '05 and up engine problems would be VERY low.
Based on my reading here on the forum, that combination should produce some very good reliability figures.
Speaking of reliability, the Star Mazda Series / Formula Mazda cars use our
13B engine and they claim that the reliability record is excellent, and unlike other formula x series cars and engines, the Renesis engines last an entire season and do not require teardown and rebuild mid season or post race. I watched one of their races a few weeks ago and it was amazing to watch the entire field running WOT for most of the race ... and I don't think I saw any mechanical issues.. engine wise. Pretty cool ... and a tribute to the RX8!
#206
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Well thats it, I will make it my duty to hear the buzzer at least once a week.
What I am interested in the most is seeing if it has fixed the one problem that has occurred since early on. While on the highway cruising along at 80mph, sometimes going up a small hill/incline, the car will lose 10 - 15 mph. Even pushing the accelerator all the way to the floor, doesnt help. Then in ten to twenty seconds you can feel the power all of sudden kick back in. Its been to Mazda many times about this, but of course never happens when they test drive it.
What I am interested in the most is seeing if it has fixed the one problem that has occurred since early on. While on the highway cruising along at 80mph, sometimes going up a small hill/incline, the car will lose 10 - 15 mph. Even pushing the accelerator all the way to the floor, doesnt help. Then in ten to twenty seconds you can feel the power all of sudden kick back in. Its been to Mazda many times about this, but of course never happens when they test drive it.
#207
What I am interested in the most is seeing if it has fixed the one problem that has occurred since early on. While on the highway cruising along at 80mph, sometimes going up a small hill/incline, the car will lose 10 - 15 mph. Even pushing the accelerator all the way to the floor, doesnt help. Then in ten to twenty seconds you can feel the power all of sudden kick back in. Its been to Mazda many times about this, but of course never happens when they test drive it.
#208
Registered
Well thats it, I will make it my duty to hear the buzzer at least once a week.
What I am interested in the most is seeing if it has fixed the one problem that has occurred since early on. While on the highway cruising along at 80mph, sometimes going up a small hill/incline, the car will lose 10 - 15 mph. Even pushing the accelerator all the way to the floor, doesnt help. Then in ten to twenty seconds you can feel the power all of sudden kick back in. Its been to Mazda many times about this, but of course never happens when they test drive it.
What I am interested in the most is seeing if it has fixed the one problem that has occurred since early on. While on the highway cruising along at 80mph, sometimes going up a small hill/incline, the car will lose 10 - 15 mph. Even pushing the accelerator all the way to the floor, doesnt help. Then in ten to twenty seconds you can feel the power all of sudden kick back in. Its been to Mazda many times about this, but of course never happens when they test drive it.
Did you have the new decarboning TSB done? This is separate from the new flash and it's intended for cars that have experienced loss of power.
#209
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Just got back home and twice took it above 9k and no damn buzzer, WTF?
#211
Grand Chancellor
Speaking of reliability, the Star Mazda Series / Formula Mazda cars use our
13B engine and they claim that the reliability record is excellent, and unlike other formula x series cars and engines, the Renesis engines last an entire season and do not require teardown and rebuild mid season or post race. I watched one of their races a few weeks ago and it was amazing to watch the entire field running WOT for most of the race ... and I don't think I saw any mechanical issues.. engine wise. Pretty cool ... and a tribute to the RX8!
13B engine and they claim that the reliability record is excellent, and unlike other formula x series cars and engines, the Renesis engines last an entire season and do not require teardown and rebuild mid season or post race. I watched one of their races a few weeks ago and it was amazing to watch the entire field running WOT for most of the race ... and I don't think I saw any mechanical issues.. engine wise. Pretty cool ... and a tribute to the RX8!
#212
I seem to be getting about 10-15 extra miles per tank. I usually fill up when the needle's around 1/4 tank. I was usually at 210 miles at that point, filling up with 11-12 gallons. Now I fill up with the same amount of gas but I'm at 220-225 miles. I've filled up about 10 times since the flash.
#213
Registered Zoom Zoomer
iTrader: (2)
To get that kind of empirical data one would have to measure many variables over time, which I'm confident Mazda quality assurance does, and will hopefully lead to ever better rotary designs (larger thermal mass and direct fuel injection for the 16X for instance). My 'imprecise science' is a combination of common sense, experience as a multi-discipline engineer and age.
I run 5w-20 year round (cooler climate my area; infrequent Winter use) and pre-mix 4 oz/tank Idemitsu in the Summer, along with the fuel system cleaner mentioned. I typically use a quality detergent gasoline as well (Mobil or Shell).
I run 5w-20 year round (cooler climate my area; infrequent Winter use) and pre-mix 4 oz/tank Idemitsu in the Summer, along with the fuel system cleaner mentioned. I typically use a quality detergent gasoline as well (Mobil or Shell).
I understand. I do, btw, premix with Idemitsu.
I'm wondering whether your 'imprecise science' is based on theory, surveys from other forum members, "new engine club" member experiences, teardowns of RX8 or RX7 motors or just good ol'gut feel?
I've often wondered how many engines have been replaced or required major work if they hadbeen premixed, driven to redline once a day and maybe run oil heavier than 5w20. That would be an interesting poll. My guess is,with that combination of treatment, the number of MT '05 and up engine problems would be VERY low.
Based on my reading here on the forum, that combination should produce some very good reliability figures.
Speaking of reliability, the Star Mazda Series / Formula Mazda cars use our
13B engine and they claim that the reliability record is excellent, and unlike other formula x series cars and engines, the Renesis engines last an entire season and do not require teardown and rebuild mid season or post race. I watched one of their races a few weeks ago and it was amazing to watch the entire field running WOT for most of the race ... and I don't think I saw any mechanical issues.. engine wise. Pretty cool ... and a tribute to the RX8!
I'm wondering whether your 'imprecise science' is based on theory, surveys from other forum members, "new engine club" member experiences, teardowns of RX8 or RX7 motors or just good ol'gut feel?
I've often wondered how many engines have been replaced or required major work if they hadbeen premixed, driven to redline once a day and maybe run oil heavier than 5w20. That would be an interesting poll. My guess is,with that combination of treatment, the number of MT '05 and up engine problems would be VERY low.
Based on my reading here on the forum, that combination should produce some very good reliability figures.
Speaking of reliability, the Star Mazda Series / Formula Mazda cars use our
13B engine and they claim that the reliability record is excellent, and unlike other formula x series cars and engines, the Renesis engines last an entire season and do not require teardown and rebuild mid season or post race. I watched one of their races a few weeks ago and it was amazing to watch the entire field running WOT for most of the race ... and I don't think I saw any mechanical issues.. engine wise. Pretty cool ... and a tribute to the RX8!
Last edited by Huey52; 04-10-2008 at 06:57 AM.
#214
Tony says, RX8s are GREAT
Got the MSP-16 flash done
Feels more responsive between 3k to 5k, feels like before from 5k to 7k, then after 7k to redline feels stronger then before
car still idles the same, i think im getting slightly better gas millage.
overall, yes i can feel a difference by the seat of my pants!!
Feels more responsive between 3k to 5k, feels like before from 5k to 7k, then after 7k to redline feels stronger then before
car still idles the same, i think im getting slightly better gas millage.
overall, yes i can feel a difference by the seat of my pants!!
#215
Registered
How long have you had this car? And you've never heard the beep? it comes on at 8500 and stays on anywhere above that.
Try redlining 3rd gear with windows closed, you'll hear it for sure, 1st gear it might just end too quickly because its only above 8500 for a split second
Try redlining 3rd gear with windows closed, you'll hear it for sure, 1st gear it might just end too quickly because its only above 8500 for a split second
#216
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Yeah I have heard it before, but have to admit it has been awhile. (Bose can drowned that out easily). And I have had the car since new. It just didnt come on the other day. And the weird thing is I went to about 9300 rpm before letting off. Isnt the car supposed to prevent the engine from spinning faster than 9k?
#217
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Nah, the cutoff is usually around 9,200, but I did once cause it to rev to just under 10,000 by clutching at the right moment when accelerating downhill.
#218
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Took my 04 6spd in on this, also had them check the milky dip stick and some idle vibration. They ended up replacing the intake, replacing an engine mount, and doing the pcm flash.....my 8 is running soooo much better. Was not running 'bad' before, but it's much smoother acceleration. Thanks for posting information like this. Also good reason to keep coming back to the boards even when you are 'content'.
#220
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Had the PCM flash done last friday. Seems to run about the same but perhaps a bit more stable at low RPM's. I'm happy with it. Now if only I could get the dealer to replace my gas tank filler neck...
#223
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officially a recall now?
Looks like this might have become an official recall. Logged into my owners page on mazdausa.com this started showing up:
----------------------------------------
Recall Warning
Date: 03/14/2008
RX-8 - Engine Lack Of Power
RX-8 Voluntary Emission Recall
-----------------------------------------
I'm pretty sure that the lack of power wasn't there last week even though it says 3/14. I've got an 04 with an early vin so it may not be all 8's.
----------------------------------------
Recall Warning
Date: 03/14/2008
RX-8 - Engine Lack Of Power
RX-8 Voluntary Emission Recall
-----------------------------------------
I'm pretty sure that the lack of power wasn't there last week even though it says 3/14. I've got an 04 with an early vin so it may not be all 8's.
#225
Still plays with cars
iTrader: (16)
Looks like this might have become an official recall. Logged into my owners page on mazdausa.com this started showing up:
----------------------------------------
Recall Warning
Date: 03/14/2008
RX-8 - Engine Lack Of Power
RX-8 Voluntary Emission Recall
-----------------------------------------
I'm pretty sure that the lack of power wasn't there last week even though it says 3/14. I've got an 04 with an early vin so it may not be all 8's.
----------------------------------------
Recall Warning
Date: 03/14/2008
RX-8 - Engine Lack Of Power
RX-8 Voluntary Emission Recall
-----------------------------------------
I'm pretty sure that the lack of power wasn't there last week even though it says 3/14. I've got an 04 with an early vin so it may not be all 8's.