weird sound

Nissan 300ZX technical discussion forum: Maintenance, performance, installations, modifications, how-to's and troubleshooting.
leplascencia
Posts: 275
Joined: Thu Jan 17, 2008 9:42 pm
Car: 1991 nissan 300zx 2+2 manual and TT (swap)

Post

My Z sounds like a supercharged mustang it started about two weeks ago anybody has any ideas what this sound might be?
Thanks for your imput


User avatar
vitaminZ
Posts: 226
Joined: Thu Mar 11, 2010 3:28 pm
Car: 1990 Nissan 300ZX
Location: Toronto, Canada

Post

leplascencia wrote:My Z sounds like a supercharged mustang it started about two weeks ago anybody has any ideas what this sound might be?
Thanks for your imput
your intake?

robomatic12
Posts: 672
Joined: Sun Jul 12, 2009 12:05 pm
Car: 1990 300ZX TT

Post

Vacuum leak! Probably a big one. Look for hoses unplugged or open pipes coming from the intake manifold. Do a boost leak to see where the air is escaping from

leplascencia
Posts: 275
Joined: Thu Jan 17, 2008 9:42 pm
Car: 1991 nissan 300zx 2+2 manual and TT (swap)

Post

If it was a vacuum leak specially if it's a big one wouldn't the car idle erratically and maybe even shut down.

Just thinking but I'll give it a try I'll do a boost leak

marty1mc
Posts: 733
Joined: Sat Jan 16, 2010 1:51 am
Car: 1990 Nissan 300ZX TT - Z owner since 2003
Location: Fuquay Varina,NC

Post

Power steering pumps when they whine will sound like a super charger. Is your fluid low or can you see bubbles in the fluid?

robomatic12
Posts: 672
Joined: Sun Jul 12, 2009 12:05 pm
Car: 1990 300ZX TT

Post

Ok let's get a better idea of what your idea of a supercharger sounds like. When does it make the noise, all the time the engine is running? Only at idle, only at speed, or under acceleration? Does it whine, or is a high pitch squeel?

leplascencia
Posts: 275
Joined: Thu Jan 17, 2008 9:42 pm
Car: 1991 nissan 300zx 2+2 manual and TT (swap)

Post

It wines under acceleration all gears it does not do it at idle or when reving the engine and is nota high pitch sound and when I say it sounds like a supercharged mustang it sounds just like that example the saleen mustang on I am legend

robomatic12
Posts: 672
Joined: Sun Jul 12, 2009 12:05 pm
Car: 1990 300ZX TT

Post

So you can rev the engine in neutral and you do not hear the noise correct? What happens if you shift into neutral when you are at speed when it makes the noise (safely of course)? Does it sound like it's coming from the engine, from the rear or a side?

It was a Shelby GT500 in the movie BTW :)

User avatar
bbecker17
Posts: 139
Joined: Thu Sep 24, 2009 11:53 am
Car: 1991 240sx.... dead
1990 300zx tt jdm
Location: Saskatchewan

Post

leplascencia wrote:It wines under acceleration all gears it does not do it at idle or when reving the engine and is nota high pitch sound and when I say it sounds like a supercharged mustang it sounds just like that example the saleen mustang on I am legend
your car a 5sp? sounds like its comeing from the middle of the car? noise increases with rpm?


Transmission!!!!!

mineee does its sounds awesome if it was supposed to sound like that

leplascencia
Posts: 275
Joined: Thu Jan 17, 2008 9:42 pm
Car: 1991 nissan 300zx 2+2 manual and TT (swap)

Post

I guess it does sound nice ir sounds like I have both a supercharger and turbos but its not supposed to,
im not really sure where it comes from but thats what I was thinking maybe my transmision but i hope not :ohno:



Robomatic 12
yes you are right shelby GT5000 :yesnod
I really can't tell but I want to say middle and I think bbecker17 might be right i hope not
ill let you guys know what I find

User avatar
cbedessie411
Posts: 15
Joined: Tue May 25, 2010 1:27 pm
Car: 94 Nissan 300zx

Post

yeah it is the powersteering pump had the same issue. Everytime you drive there is this whining sound. When you turn your wheel does it make a whining sound

User avatar
grk nickafis
Posts: 510
Joined: Sat Jul 18, 2009 2:17 pm
Car: Looking for something fun.
2011 GMC Sierra
Location: NJ

Post

just put ATF and A new pump (maybe a light weight pulley if you want) and belt. Then your twinscrew supercharger will go away.

leplascencia
Posts: 275
Joined: Thu Jan 17, 2008 9:42 pm
Car: 1991 nissan 300zx 2+2 manual and TT (swap)

Post

Ok ill look into that just now im kind of busy and have no time to do anything to the z but thanks for your input and i will let you guys know what the outcome is

User avatar
redneck zx
Posts: 72
Joined: Sun Sep 06, 2009 6:58 pm
Car: 1991 300zx TT
Location: montesano/olyimpa wasington

Post

my old zs transmission was f###d and waled bad sounded like a super charger it sucked
hade a power steerting issue for me it screamd and squeld real sharp if thats the case make shure you get the correct flued (its like a hydrolic type flued)for it
same with transmission get right flued or it will sease after awhile!?!?!

leplascencia
Posts: 275
Joined: Thu Jan 17, 2008 9:42 pm
Car: 1991 nissan 300zx 2+2 manual and TT (swap)

Post

Update so I was able to finally drive the z and as I'm driving i depress the clutch and rev the engine and nothing it sounds normal but when in gear it squeals so I'm guessing transmission I'm gping to check the fluids and take it from there hope nothing is messed up

User avatar
Chattzx
Posts: 1495
Joined: Wed Aug 26, 2009 5:02 pm
Car: 90 Z32
Location: Chattanooga, Tennessee

Post

redneck zx wrote:my old zs transmission was f###d and waled bad sounded like a super charger it sucked
hade a power steerting issue for me it screamd and squeld real sharp if thats the case make shure you get the correct flued (its like a hydrolic type flued)for it
same with transmission get right flued or it will sease after awhile!?!?!
I hope your not a member on 3ZC, because they would boot you from the site from your spelling/grammar. I'm sure you can type a bit better than that.

leplascencia
Posts: 275
Joined: Thu Jan 17, 2008 9:42 pm
Car: 1991 nissan 300zx 2+2 manual and TT (swap)

Post

I guess it's a good thing he posted on NICO not on 3ZC

User avatar
redneck zx
Posts: 72
Joined: Sun Sep 06, 2009 6:58 pm
Car: 1991 300zx TT
Location: montesano/olyimpa wasington

Post

300zx4life wrote:
redneck zx wrote:my old zs transmission was f###d and waled bad sounded like a super charger it sucked
hade a power steerting issue for me it screamd and squeld real sharp if thats the case make shure you get the correct flued (its like a hydrolic type flued)for it
same with transmission get right flued or it will sease after awhile!?!?!
I hope your not a member on 3ZC, because they would boot you from the site from your spelling/grammar. I'm sure you can type a bit better than that.

actuly i am member of 3zc but dont get on there to much just hear and nwza.org

leplascencia
Posts: 275
Joined: Thu Jan 17, 2008 9:42 pm
Car: 1991 nissan 300zx 2+2 manual and TT (swap)

Post

I cheked the fluid and it only had abour one quart i hope theres no damage to the gears, didnt drive it yet hopefuly on monday

I guess I have to check for leaks on the transmission


Return to “300ZX (Z32) Technical”