Humming noise on start ups...got video - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

s13pignose · 12-04-2007, 09:36 PM

[ame]http://www.youtube.com/watch?v=l_sLjXkQh8w[/ame]

thats a video of under my hood on start ups, and about maybe halfway in the video you'll hear a loud humming noise. Definitely coming from the front of the car. It is driving me crazy and is embarrasing.

Any ideas on what it is?

Thanks in advance

khilgers · 12-04-2007, 09:49 PM

power steering pump......just a guess. Could be a lot of things. Try having a friend start the car and see if you can get a better idea of where it's coming from and go from there. You can also use a long screwdriver as a make shift stethoscope to pinpoint noises. Good luck.

LA_phantom_240 · 12-04-2007, 09:56 PM

My s14 does that when she's first started up in the morning and when she's really cold. It makes that sound when you pull your foot off the clutch, right?

Chrischeezer · 12-05-2007, 01:24 AM

sounds like a glazed clutch...
does it do this when u release the clutch to shift? or only on start up?

have someone start it a few times.. and keep your ear right next to the motor..

projekt_s13 · 12-05-2007, 01:41 AM

yep your clutch, mine did that sometimes.

s13pignose · 12-05-2007, 09:03 AM

Sorry guys don't think its that cause I have an automatic. So maybe it is ps related. Friend of mine said he thought it was a purge valve when I told
him about it, but he was never around to actually there to hear it.

Thanks

s13pignose · 12-06-2007, 07:54 AM

Oh yeah one question though...if its ps related...hoe come it doesn't do it on all start ups. The pump is belt driven, so I figured it should happen all the time if its shot. Also never hear anything when I make turns.

tiresmokes13 · 12-06-2007, 11:33 AM

your starter is making the noise.
Its time for a new one soon.

status:one · 12-06-2007, 12:24 PM

that screeching sound when the car is turning on sounds like the starter is going bad.

motorsnail · 12-06-2007, 12:35 PM

Kinda hard to tell bad microphone....Could either be starter or a belt about to snap or a pully making funny noises. Have someone start the car while you hear where its coming from.

Edit: when belts get worn out they stretch the slack will make a wierd noise as the slack gets tacken away on start up because it goes from hanging with slack to spinning. Like it "chirps" on the pully sounds kinda like taking a peice on rubber across a wood floor kinda.

s13pignose · 12-06-2007, 08:46 PM

Hmm okay...I had someone start today while I listened and it sounded like it was coming from the back of the motor. I'll try it a couple more times tommorow and see if I can come up with anything new.

LA_phantom_240 · 12-06-2007, 10:09 PM

Its not a belt or starter related. My s14 makes the EXACT same noise and like I said, it only happens when the motor is really cold. It makes no sound when I start it up with my foot on the clutch, but when I let out it makes that noise once or twice.

I realize the OP doesn't have a stick, but the noise is identical. Its somewhere near the back of the motor or in the tranny.

12-04-2007, 09:36 PM	#1
s13pignose Zilvia FREAK! Join Date: Dec 2005 Location: ?? Posts: 1,324 Trader Rating: (2) Feedback Score: 2 reviews	Humming noise on start ups...got video [ame]http://www.youtube.com/watch?v=l_sLjXkQh8w[/ame] thats a video of under my hood on start ups, and about maybe halfway in the video you'll hear a loud humming noise. Definitely coming from the front of the car. It is driving me crazy and is embarrasing. Any ideas on what it is? Thanks in advance

12-05-2007, 01:24 AM	#4
Chrischeezer Zilvia FREAK! Join Date: Jul 2005 Location: earth Age: 41 Posts: 1,406 Trader Rating: (2) Feedback Score: 2 reviews	sounds like a glazed clutch... does it do this when u release the clutch to shift? or only on start up? have someone start it a few times.. and keep your ear right next to the motor.. __________________

12-05-2007, 01:41 AM	#5
projekt_s13 Post Whore! Join Date: Jul 2005 Location: Chico/Pittsburg, CA Age: 39 Posts: 2,801 Trader Rating: (5) Rides Gallery: projekt_s13 Feedback Score: 5 reviews	yep your clutch, mine did that sometimes. __________________

12-06-2007, 12:24 PM	#9
status:one Zilvia FREAK! Join Date: May 2006 Location: Dallas, TX Age: 39 Posts: 1,258 Trader Rating: (0) Rides Gallery: status:one Feedback Score: 0 reviews	that screeching sound when the car is turning on sounds like the starter is going bad. __________________

12-04-2007, 09:49 PM	#2
khilgers Zilvia Addict Join Date: Oct 2005 Location: Twin Cities Age: 44 Posts: 893 Trader Rating: (0) Rides Gallery: khilgers Feedback Score: 0 reviews	power steering pump......just a guess. Could be a lot of things. Try having a friend start the car and see if you can get a better idea of where it's coming from and go from there. You can also use a long screwdriver as a make shift stethoscope to pinpoint noises. Good luck.

12-05-2007, 09:03 AM	#6
s13pignose Zilvia FREAK! Join Date: Dec 2005 Location: ?? Posts: 1,324 Trader Rating: (2) Feedback Score: 2 reviews	Sorry guys don't think its that cause I have an automatic. So maybe it is ps related. Friend of mine said he thought it was a purge valve when I told him about it, but he was never around to actually there to hear it. Thanks

12-06-2007, 07:54 AM	#7
s13pignose Zilvia FREAK! Join Date: Dec 2005 Location: ?? Posts: 1,324 Trader Rating: (2) Feedback Score: 2 reviews	Oh yeah one question though...if its ps related...hoe come it doesn't do it on all start ups. The pump is belt driven, so I figured it should happen all the time if its shot. Also never hear anything when I make turns.

12-06-2007, 11:33 AM	#8
tiresmokes13 Banned from the Marketplace Join Date: Jun 2006 Location: Socal Posts: 461 Trader Rating: (0) Feedback Score: 0 reviews	your starter is making the noise. Its time for a new one soon.

12-06-2007, 12:35 PM	#10
motorsnail Zilvia Addict Join Date: Jun 2007 Location: Oklahoma Age: 37 Posts: 625 Trader Rating: (0) Feedback Score: 0 reviews	Kinda hard to tell bad microphone....Could either be starter or a belt about to snap or a pully making funny noises. Have someone start the car while you hear where its coming from. Edit: when belts get worn out they stretch the slack will make a wierd noise as the slack gets tacken away on start up because it goes from hanging with slack to spinning. Like it "chirps" on the pully sounds kinda like taking a peice on rubber across a wood floor kinda.

12-06-2007, 08:46 PM	#11
s13pignose Zilvia FREAK! Join Date: Dec 2005 Location: ?? Posts: 1,324 Trader Rating: (2) Feedback Score: 2 reviews	Hmm okay...I had someone start today while I listened and it sounded like it was coming from the back of the motor. I'll try it a couple more times tommorow and see if I can come up with anything new.