hissing noise in the engine?
07-21-2004, 12:39 AM
#1
Sonic the Hedghog
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hissing noise in the engine?
Hi, i noticed that after the car is warmed up and after driving it, it makes like a hissing noise maybe an airleak type of noise, or like a teapot wisle. Now is that normal or something new? Did anybody here this noise?
07-21-2004, 04:33 AM
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Yes, I have noticed a hissing sound in mine as well, although it only occurs occasionaly. It happens when the car is fully warmed up, and the A/C is running. Also, for me it doesn't sound like it's coming from the engine, but rather from the right side of the car. Aside from the noise, I haven't noticed any problems. If someone has an answer, I'd greatly appreciate it!
07-21-2004, 10:37 AM
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Same here
I have noticed the same intermitent hissing noise comming from what seems like the right rear side of the car. Glad to hear I'm not the only one hearing it, my wife thinks i'm nuts. Anybody know what it is?
07-21-2004, 10:39 AM
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look MA! No PISTONS!!!!
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between hissing, ticking & the rattling... man... this has gotta be the car with the most variety of noises evAr!
& yes, I have all three, only two (hissing & ticking) comes from the engine area.
the hissing i usually only hear when I'm WOT while the ticking is at cold starts.
But I've given up tryin to find out where they're coming from... if I breaks, dealer time.
& yes, I have all three, only two (hissing & ticking) comes from the engine area.
the hissing i usually only hear when I'm WOT while the ticking is at cold starts.
But I've given up tryin to find out where they're coming from... if I breaks, dealer time.
Last edited by sjt; 07-21-2004 at 10:41 AM.
07-22-2004, 05:23 AM
#9
I don't buy Kool-Aid
Originally Posted by sjt
between hissing, ticking & the rattling... man... this has gotta be the car with the most variety of noises evAr!
& yes, I have all three, only two (hissing & ticking) comes from the engine area.
the hissing i usually only hear when I'm WOT while the ticking is at cold starts.
But I've given up tryin to find out where they're coming from... if I breaks, dealer time.
& yes, I have all three, only two (hissing & ticking) comes from the engine area.
the hissing i usually only hear when I'm WOT while the ticking is at cold starts.
But I've given up tryin to find out where they're coming from... if I breaks, dealer time.
Originally Posted by Xystas
Yes, I've heard the hissing noise in my car... but only when the AC is running... it seems to come from the vents... check it next time you drive
09-15-2004, 10:45 AM
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Hi, I hear that hissing noise even when the engine is off! It stars to sound when I turn the ky into the first position (when lightS and other electric systemns start to work).
is this normal?
Regards,
is this normal?
Regards,
09-16-2004, 02:36 AM
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Whaaaa?
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If you hear hissing just when the AC is on it's most likely the refrigerant passing through the evaporator under the dash - ie: it's the AC working (the evaporator is under the dash on the right hand side I believe). All cars I've had with AC you could hear it, my Jeep will continue to make the noise for a little while after it's shut off if you've been running the AC while the pressures in the system balance out.
Hissing when turning the key on but the engine off could be a myriad of valves, solenoids, airpumps, fans, etc. in the engine bay doing their startup cycle. I believe the airpump runs for a brief second when the key goes to ON before starting. It's also on the right hand side of the engine bay.
Hissing when turning the key on but the engine off could be a myriad of valves, solenoids, airpumps, fans, etc. in the engine bay doing their startup cycle. I believe the airpump runs for a brief second when the key goes to ON before starting. It's also on the right hand side of the engine bay.
09-16-2004, 06:09 AM
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I too hear rattling, ticking, hissing, etc sounds from all over the car.
It's been doing it since day 1 and I'm not the slightest concerned since it's all part of the 8's charm!
Coming from a S14 200sx and a DC5 Type R, I'm kinda used to all sorts of weird noises emanating from a car.
If I wanted something as quiet as a tomb, I would have brought a Lexus.
It's been doing it since day 1 and I'm not the slightest concerned since it's all part of the 8's charm!
Coming from a S14 200sx and a DC5 Type R, I'm kinda used to all sorts of weird noises emanating from a car.
If I wanted something as quiet as a tomb, I would have brought a Lexus.
09-16-2004, 06:37 AM
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WOW, what a buch of candy-asses! First, I LIKE the hissing sound, it makes the RX-8 sound ALIVE!. As for the rest of the noises, it isn't so bad. Ever drive a Miata? Ever drive a Celica GT-S? You want a quiet car? Get a Camry or Accord. Everyone drools over a Viper or Ford GT - well those of you that think the RX-8 is noisy would probably CRY inside one of them.
Are there ANY MORE complaints or NITS that anyone can come up with?
The RX-8 is a very lightweight vehicle for 4 seats/2 doors, In order to acheive this LOW MASS - Mazda went with little or no sound insulation, and light weight panels and parts. The beautiful handling is in part because of this light weight. You want it quiet? Add sound insulation and some more bracing , then you lose some handling dexterity - it's that simple.
Are there ANY MORE complaints or NITS that anyone can come up with?
The RX-8 is a very lightweight vehicle for 4 seats/2 doors, In order to acheive this LOW MASS - Mazda went with little or no sound insulation, and light weight panels and parts. The beautiful handling is in part because of this light weight. You want it quiet? Add sound insulation and some more bracing , then you lose some handling dexterity - it's that simple.
09-16-2004, 02:22 PM
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I get that whistling too. What greatly annoys me though is that it sounds about the same as a siren would from a great distance, which gets me all jumpy thinking there's a cop chasing me or something.
09-16-2004, 04:33 PM
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i get that whistle in 6th gear during an uphill climb. i've asked the question almost a year ago and i still havent gotten an answer. i've pretty much given up and assumed its normal. besides i have to have the radio practically on mute when i hear it.
09-25-2004, 11:52 AM
#19
Are the noises you hear coming at specific rpm ranges?
At engine speeds below 3250 rpm, air flows through the primary intake ports only. This keeps the intake air velocity high.
At the lower end of the primary intake tubes near the ports, high velocity air discharges from the Port Air Bleeds. This is the Jet Air Fuel Mixing system. The air discharge is caused by the pressure differential between the upper end of the primary air intake and the port air bleeds. This high velocity airflow blows fuel off port surfaces and increases turbulence. Atomization is improved and the mixture distribution is optimized. Atomized fuel is directed toward the ports and away from surfaces for the Anti-Wet Port effect. This Jet Air Fuel Mixing system is present in both Standard Power and High Power engines.
Above 3250 rpm, and when engine load is great enough, the Secondary Shutter Valve opens to permit airflow through secondary intake passages. The engine is now using two intake pipes and two intake ports per rotor. This reduces restriction and increases airflow and torque. The Secondary Shutter Valve is controlled by a vacuum control solenoid. Although the High Power engine is shown, the Secondary Shutter Valve works the same way in the Standard Power engine.
Above 5500 rpm, the Variable Fresh Air Duct opens to add another intake air path. When open, the VFAD doubles the amount of air available to the engine and reduces restriction. The VFAD is controlled by a vacuum actuator. It is not open at all times because noise is also increased.
The VFAD system is only on the High Power engine. The Standard Power engine has a short inlet duct with a large diameter.
Above 6250 rpm, the Auxiliary Port Valve opens the third or auxiliary intake port for additional airflow. All six ports are now used to increase horsepower and torque. The Auxiliary Port Valve is controlled by an electric motor through gears, a rack and linkage. The valve cycles each time the ignition is turned off to clear carbon. The Auxiliary Port Valve is used on the High Power engine only.
The High Power RENESIS Rotary Engine takes advantage of pressure waves in the incoming air to boost charging. This increases torque and power at higher engine speeds. At engine speeds above 7250 rpm, the Variable Dynamic Effect Intake Valve opens to shorten the effective length of the intake tubes. Intake pressure pulses reflecting back and forth in the intake manifold tubes force more intake charge through the ports and into the chamber. The VDI Valve is on both High Power and Standard Power engines, and is controlled by vacuum.
At the lower end of the primary intake tubes near the ports, high velocity air discharges from the Port Air Bleeds. This is the Jet Air Fuel Mixing system. The air discharge is caused by the pressure differential between the upper end of the primary air intake and the port air bleeds. This high velocity airflow blows fuel off port surfaces and increases turbulence. Atomization is improved and the mixture distribution is optimized. Atomized fuel is directed toward the ports and away from surfaces for the Anti-Wet Port effect. This Jet Air Fuel Mixing system is present in both Standard Power and High Power engines.
Above 3250 rpm, and when engine load is great enough, the Secondary Shutter Valve opens to permit airflow through secondary intake passages. The engine is now using two intake pipes and two intake ports per rotor. This reduces restriction and increases airflow and torque. The Secondary Shutter Valve is controlled by a vacuum control solenoid. Although the High Power engine is shown, the Secondary Shutter Valve works the same way in the Standard Power engine.
Above 5500 rpm, the Variable Fresh Air Duct opens to add another intake air path. When open, the VFAD doubles the amount of air available to the engine and reduces restriction. The VFAD is controlled by a vacuum actuator. It is not open at all times because noise is also increased.
The VFAD system is only on the High Power engine. The Standard Power engine has a short inlet duct with a large diameter.
Above 6250 rpm, the Auxiliary Port Valve opens the third or auxiliary intake port for additional airflow. All six ports are now used to increase horsepower and torque. The Auxiliary Port Valve is controlled by an electric motor through gears, a rack and linkage. The valve cycles each time the ignition is turned off to clear carbon. The Auxiliary Port Valve is used on the High Power engine only.
The High Power RENESIS Rotary Engine takes advantage of pressure waves in the incoming air to boost charging. This increases torque and power at higher engine speeds. At engine speeds above 7250 rpm, the Variable Dynamic Effect Intake Valve opens to shorten the effective length of the intake tubes. Intake pressure pulses reflecting back and forth in the intake manifold tubes force more intake charge through the ports and into the chamber. The VDI Valve is on both High Power and Standard Power engines, and is controlled by vacuum.
09-25-2004, 12:40 PM
#20
Never had a whistle in 10,00 miles. Now after I installed the RB exhaust it whistles.
Still trying to track it down. Because the engine is breathing better I think it's comming from the intake near the firewall.
Still trying to track it down. Because the engine is breathing better I think it's comming from the intake near the firewall.
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