I have searched for the last 3 weeks on this forum for advice about where to start. There is a very strange noise that occurs near 5000 RPMs and up on my car. I will do my best to give as much detailed information as I can to the problem and the noise itself.
My 8 is an '07, 6 speed with 110K miles on it, and no cat simply a straight pipe (I purchased the car that way). I just replaced the spark plugs, the coils, and the wires about 2 months ago. This strange noise started I would estimate about 3-4 weeks ago.
When the engine is first started, this noise does not appear to be there. The best way I could describe it is it sounds as if the engine is fighting itself. It reminds me of a valve float noise; a tapping sound. My brother said it sounds like a jack hammer but you cannot feel through the petal or the car itself. The sound is directly tied to the RPM's because as they increase so does the frequency of the sound. Also the engine takes longer than normal to accelerate to the red line when this noise is present. Again this only happens when the engine is fully warmed up and under load. If I rev the engine while in neutral with no load the noise is not there.
The engine also seems to be running extremely, EXTREMELY rich. This started occurring when the noise started as well (at least that's when I really took note of it). When at a red light I will depress the gas petal and there is momentary pause before the RPM's begin to rise. There have been a few times when I've almost stalled the car.
I'm new to rotary engines, and I've read all the "new owner" forums. Any advice would be greatly appreciated, as I'm at a loss.
I do believe the rich exhaust (richer than usual) and this noise are directly related. I know rich exhaust is a result of not have a cat installed but I've had this car for well over a year now, taken great care of it, and it never had this pungent an aroma or acted this capricious.
My 8 is an '07, 6 speed with 110K miles on it, and no cat simply a straight pipe (I purchased the car that way). I just replaced the spark plugs, the coils, and the wires about 2 months ago. This strange noise started I would estimate about 3-4 weeks ago.
When the engine is first started, this noise does not appear to be there. The best way I could describe it is it sounds as if the engine is fighting itself. It reminds me of a valve float noise; a tapping sound. My brother said it sounds like a jack hammer but you cannot feel through the petal or the car itself. The sound is directly tied to the RPM's because as they increase so does the frequency of the sound. Also the engine takes longer than normal to accelerate to the red line when this noise is present. Again this only happens when the engine is fully warmed up and under load. If I rev the engine while in neutral with no load the noise is not there.
The engine also seems to be running extremely, EXTREMELY rich. This started occurring when the noise started as well (at least that's when I really took note of it). When at a red light I will depress the gas petal and there is momentary pause before the RPM's begin to rise. There have been a few times when I've almost stalled the car.
I'm new to rotary engines, and I've read all the "new owner" forums. Any advice would be greatly appreciated, as I'm at a loss.
I do believe the rich exhaust (richer than usual) and this noise are directly related. I know rich exhaust is a result of not have a cat installed but I've had this car for well over a year now, taken great care of it, and it never had this pungent an aroma or acted this capricious.
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