odd sound - Thinking of selling and going back to a V6
#1
odd sound - Thinking of selling and going back to a V6
Hi guys
I am looking at how much my 8 is worth, I really don't want to sell but I cant find any garage including Mazda that knows what they are doing with the rotary engine.
My car sounds terrible but no garage can give me a straight answer whether this noise is normal for a rotary. So I am really close to just trading my rx8 in for something else.
Here is a vid: https://www.youtube.com/watch?v=knwZ...ature=youtu.be
Thanks
Antony
Can anyone upload of video of their stock rx8, my makes that noise around 1000 - 3000rpm.
I am looking at how much my 8 is worth, I really don't want to sell but I cant find any garage including Mazda that knows what they are doing with the rotary engine.
My car sounds terrible but no garage can give me a straight answer whether this noise is normal for a rotary. So I am really close to just trading my rx8 in for something else.
Here is a vid: https://www.youtube.com/watch?v=knwZ...ature=youtu.be
Thanks
Antony
Can anyone upload of video of their stock rx8, my makes that noise around 1000 - 3000rpm.
Last edited by tonyjms2005; 05-06-2014 at 11:20 AM.
#3
My money is on a vacuum leak (as previously stated). Until you give a bit more background (as per niteshade's request) regarding CELs, performance changes, when this sound started occurring, etc - its hard to give any answers.
#5
Hi Guys
Thanks for the replies, The compression is good and the car run well, except for a rough idle and a few spots were the car seems to hesitate below 3k rpm, the car is manual transmission with the high power engine.
This what I have checked:
New plugs, leads coils
new exhaust manifold (checked and double checked for leaks)
The ssv moves freely
No engine CEL light (I had one popup about a 6 weeks ago saying catalyst reduced efficiency, I cleared this and it hasn't returned).
I took it to mazda where they said the sound is completely normal.
The manifold I fitted is a stainless steel tubular design. After two weeks of being on the car the manifold near the triangular joint has turned blue and orange/gold.
Is this normal? Can anyone with a tubular manifold comment?
I have suspected the cat but it passed the emissions, maybe it is partially clogged?
When I changed the manifold I inspected the cat front end but it seemed intact.
Thanks again
Antony
Thanks for the replies, The compression is good and the car run well, except for a rough idle and a few spots were the car seems to hesitate below 3k rpm, the car is manual transmission with the high power engine.
This what I have checked:
New plugs, leads coils
new exhaust manifold (checked and double checked for leaks)
The ssv moves freely
No engine CEL light (I had one popup about a 6 weeks ago saying catalyst reduced efficiency, I cleared this and it hasn't returned).
I took it to mazda where they said the sound is completely normal.
The manifold I fitted is a stainless steel tubular design. After two weeks of being on the car the manifold near the triangular joint has turned blue and orange/gold.
Is this normal? Can anyone with a tubular manifold comment?
I have suspected the cat but it passed the emissions, maybe it is partially clogged?
When I changed the manifold I inspected the cat front end but it seemed intact.
Thanks again
Antony
#7
Registered
That sucks you'll want to check your cat for sure now change or check plugs wires and yes I have a header too and it's all kinds of colors this hapens as it gets hot it's normal.
#8
Registered
Did you reattach the air injection to the new header? If not did you put a block off on the header where it's suppost to go? This could be all the air sound we hear. I'm not for sure what the repecautions of running a cat with out the air injection is perhaps some one with more knolage than I can chime in.
#10
Fitted new coils, air filter, clean maf sensor. Wow what a difference when fitting the actual genuine coils! The car goes like a rocket now ![Smilie](https://www.rx8club.com/images/smilies/smile.gif)
I still get the raps sound but not as much. Maybe I but of rasp is normal? Plus I have got a toyosport tublar manifold fitted.
Thanks
Antony
![Smilie](https://www.rx8club.com/images/smilies/smile.gif)
I still get the raps sound but not as much. Maybe I but of rasp is normal? Plus I have got a toyosport tublar manifold fitted.
Thanks
Antony
#11
Hi
Again Just an update, the cel has come on with a cat efficiency warning P0420.
Could that exhaust noise be an issue with the cat being partially blocked? The airy blowing noise gets worse as I give it more power at a given rpm.
Thanks
Antony
Again Just an update, the cel has come on with a cat efficiency warning P0420.
Could that exhaust noise be an issue with the cat being partially blocked? The airy blowing noise gets worse as I give it more power at a given rpm.
Thanks
Antony
#13
The noise is present also when the engine is warmed up, the air pump only operates when the engine is cold?
I got the cat temperature off my car ecu when I pulled the code. The temp was 867 degrees centigrade at 3500rpm while cruising.
Does this sound high? I know the carpet around the exhaust tunnel gets really warm with the heat from the exhaust.
Thanks
Antony
I got the cat temperature off my car ecu when I pulled the code. The temp was 867 degrees centigrade at 3500rpm while cruising.
Does this sound high? I know the carpet around the exhaust tunnel gets really warm with the heat from the exhaust.
Thanks
Antony
#15
Thanks for the info, I have checked most of that ![Frown](https://www.rx8club.com/images/smilies/frown.gif)
I was just on youtube trying to listen to other stock rx8s, I noticed my car does really pop much on the overrun, just make a tinny rasp at the manifold, I think I will take the cat off and inspect it?
Thanks
Antony
![Frown](https://www.rx8club.com/images/smilies/frown.gif)
I was just on youtube trying to listen to other stock rx8s, I noticed my car does really pop much on the overrun, just make a tinny rasp at the manifold, I think I will take the cat off and inspect it?
Thanks
Antony
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