high-pitch sound when starting engine, what can it be?
only happens at cold engine start up when temperature is below 40F. the high pitch sound comes from under the hood and would last 4-5 seconds then disappear. the 8 drives fine.
what can it be? thanks |
secondary air pump going out.
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Originally Posted by Jedi54
(Post 3474915)
secondary air pump going out.
can you share more details? e.g., what is this secondary air pump and where is located..? how do i determine that it is indeed the cause? if so, do i have to replace it immediately or can i wait when it gets worse? can i replace it myself? i am not much a mechanic here... |
Have you checked your belts?
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If it sounds kind of like an airplane engine, then it is normal
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Originally Posted by xun4gvn4everx
(Post 3474928)
If it sounds kind of like an airplane engine, then it is normal
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Originally Posted by shallowater
(Post 3474924)
this has to be the fastest reply i have seen...:ylsuper:
Where is the sound coming from? Do you ONLY hear it on start up? Is it from the front - RIGHT side of the engine bay? (passenger side) Easy_E1 lost an air pump in his RX8 a while back, maybe he could shed some light on this. |
Mine has always done that when its cold, I thought it was normal. The noise lasts for a few seconds and goes away.
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i have this, just thought it was normal. right when i start, it's a ... well, a high-pitched squeal. it lasts maybe 4-5 secs like op said, maybe 10 secs or so, i forget. but it goes away...when it goes away it fades out smoothly, like turning down volume or something (it doesn't just stop immediately - although the fade out only takes a second or two!).
i always just assumed something was warming up. |
Originally Posted by TeeFar
(Post 3474936)
Mine has always done that when its cold, I thought it was normal.
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Originally Posted by shallowater
(Post 3474931)
not sure what exactly you mean like airplane engine...airplane engine does not sound high-pitch to me...anyways, it is kind of like scratching metal surface...very fast.
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Originally Posted by Jedi54
(Post 3474933)
Jedi Powers my good man. Jedi Powers. :cool:
Where is the sound coming from? Do you ONLY hear it on start up? Is it from the front - RIGHT side of the engine bay? (passenger side) Easy_E1 lost an air pump in his RX8 a while back, maybe he could shed some light on this. |
Originally Posted by Jedi54
(Post 3474933)
Jedi Powers my good man. Jedi Powers. :cool:
Where is the sound coming from? Do you ONLY hear it on start up? Is it from the front - RIGHT side of the engine bay? (passenger side) Easy_E1 lost an air pump in his RX8 a while back, maybe he could shed some light on this. |
Originally Posted by shallowater
(Post 3474943)
yes, i only hear it at start up. it is kind of hard for me to tell whether it is from right or left side. since the sound only lasts for 4-5 seconds, by the time i got out of the driver seat to check it out, it would be gone...maybe i will listen more carefully next time.
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Air Pump is located next to the right side strut tower. Black squarish plate 5"x5" with a dome thing on top.
That's funny. Sorry. Anyway if you open your hood when the car is cold in the morning and stand by the right front tire looking at the engine. Have someone start the car and listen for the sound. Should be quite evident if it is the air pump. or something else. |
Originally Posted by 2tone
(Post 3474938)
i have this, just thought it was normal. right when i start, it's a ... well, a high-pitched squeal. it lasts maybe 4-5 secs like op said, maybe 10 secs or so, i forget. but it goes away...when it goes away it fades out smoothly, like turning down volume or something (it doesn't just stop immediately - although the fade out only takes a second or two!).
i always just assumed something was warming up. what year/mileage you have? mine is a 07 with 25K on it. |
Originally Posted by shallowater
(Post 3474950)
yes, it is exactly like what you described... maybe it is normal then?
what year/mileage you have? mine is a 07 with 25K on it. mine is an '04, 59k. no clue as to how long i've been hearing that though, it always went away fairly quickly and was only at start-up, so i have always assumed she was just warming up, stretching her legs, etc. before take off! |
Originally Posted by Easy_E1
(Post 3474949)
Air Pump is located next to the right side strut tower. Black squarish plate 5"x5" with a dome thing on top.
That's funny. Sorry. Anyway if you open your hood when the car is cold in the morning and stand by the right front tire looking at the engine. Have someone start the car and listen for the sound. Should be quite evident if it is the air pump. or something else. |
Originally Posted by 2tone
(Post 3474956)
ha ha, well, who knows. i don't want to say it's normal and then have something crap out on us! i wish i had one of those little usb flash video camera things!
mine is an '04, 59k. no clue as to how long i've been hearing that though, it always went away fairly quickly and was only at start-up, so i have always assumed she was just warming up, stretching her legs, etc. before take off! |
Originally Posted by Easy_E1
(Post 3474949)
Air Pump is located next to the right side strut tower. Black squarish plate 5"x5" with a dome thing on top.
That's funny. Sorry. Anyway if you open your hood when the car is cold in the morning and stand by the right front tire looking at the engine. Have someone start the car and listen for the sound. Should be quite evident if it is the air pump. or something else. |
^ yeah i'll pay more attn too. glad you posted, b/c i should have paid more attn to it instead of blowing it off!!
for curiosity's sake, what does a bad air pump result in and what is cost to replace? |
Originally Posted by xun4gvn4everx
(Post 3474958)
Yes, it is normal. I also had an '04 and it made the same "jet engine" sound (as I call it) and it does exactly as you stated.
is this thread the same thing?? the only difference for me is i don't remember it after driving...mine is only at start-up. maybe this is a different noise he's talking about though. https://www.rx8club.com/series-i-tech-garage-22/high-pitch-noise-engine-83862/ |
Originally Posted by 2tone
(Post 3474966)
well that's good, at least we're not alone! i kinda like it, it is like a jet engine 'engage' kind of sound. :ylsuper:
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Don't forget to raise the landing gear O_O
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And sit down and buckle up in an upright position with your tray tables up.
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and don't get up to use the restroom until the pilot has removed the no seatbelt light
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And be sure to smack the stewardesses ass each time she passes by to let her know she is doing a good job. :yesnod:
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Originally Posted by xun4gvn4everx
(Post 3474985)
And be sure to smack the stewardesses ass each time she passes by to let her know she is doing a good job. :yesnod:
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flight attendant unfo :icon_no2:
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Originally Posted by The Reverend
(Post 3474989)
flight attendant unfo :icon_no2:
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1 Attachment(s)
have a look under your bonnet . I trhink you'll find it is this guy getting real pissed off ..
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Perhaps loosen the belts and re torque to specs. See if that eliminates the noise.
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Originally Posted by xun4gvn4everx
(Post 3474985)
and be sure to smack the stewardesses ass each time she passes by to let her know she is doing a good job. :yesnod:
________ BEST VAPORIZER |
Yeah, I've had this sound too. I've actually had it for a long time. Nothing has broke yet...I thought it was normal...
________ SexyLove4U live |
It's a normal sound its like a secondary air pump assembly on the 04 to assist with startup during cold starts if you unplug the black plug that goes to the assembly it wont come on. But I dont see why you would want to do that.
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It IS the secondary air pump under the hood on the passenger side, like many people are saying. The noise is normal.
The only reason I know that you would want to disconnect the air pump is for the deflooding procedure according to the Mazda bulletin. Which is what I've done before when I've flooded my car. I've even driven my car without reconnecting the connector (because I forgot) after successfully deflooding my car without doing any harm. So disconnecting it temporarily shouldn't hurt your car. I say this because you can do the experiment of disconnecting/connecting the air pump connector, then have someone start your car, and stand there by the hood to verify that the sound is not present/present. If so, then you've determined the sound is from the air pump, which is normal. |
sounds like a vaccume cleaner to me tho, probably just basically what it is.
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