Buzzing noise under the hood towards the back of the engine

A Q45 forum / Cima forum for the President of Infiniti's lineup. Brought to you by Infiniti Parts USA, your OEM source for Q45 parts!
User avatar
Infinitiguy19
Posts: 7756
Joined: Sat Dec 22, 2007 4:58 pm
Car: 1993 Infiniti Q45 188580 Miles
1994 Infiniti Q45a 240000 Miles

buzzzing noise under the hood that can also be herd on the right fender

Postby Infinitiguy19 » Thu May 08, 2008 8:41 am

I turn my car on today to hear some music and to clean it up a bit and I have the key in accessory and I hear this buzzing noise under the hood and on the right fender and when I press the gas it goes away meaning when the car is off I open the throttle a little bit while under the hood.

what the heck is it?

o yea I have TCS and this car has been maintained I have at least 30 recipts from the owner from transmission fluid changes to wheel rotating, and all of the under plenum hoses have been done twice.


qship96
Posts: 6624
Joined: Sun Nov 24, 2002 11:31 am
Car: 1996 Q45

Re: buzzzing noise under the hood that can also be herd o ... (ppastos)

Postby qship96 » Thu May 08, 2008 9:10 am

TCS pump is located in that area, also abs may have sticking relay{but that is more like the rear of passenger side front fender area} only other thing I can think of in that area would be windsheild washer pump, but doubt that is the issue!

User avatar
maxnix
Posts: 22606
Joined: Mon Jul 22, 2002 8:11 pm
Car: 1995 Q45, 1995 Q45t, 2000 Q45

Re: buzzzing noise under the hood that can also be herd o ... (ppastos)

Postby maxnix » Thu May 08, 2008 9:14 am

Sure it's not the ABS pump? If so, check its relay.

User avatar
Infinitiguy19
Posts: 7756
Joined: Sat Dec 22, 2007 4:58 pm
Car: 1993 Infiniti Q45 188580 Miles
1994 Infiniti Q45a 240000 Miles

Re: buzzzing noise under the hood that can also be herd o ... (maxnix)

Postby Infinitiguy19 » Thu May 08, 2008 10:54 am

would the nissan consult be able to find the bad relay?

If so I will be taking the car in a couple of weeks for a general diagnostic for $130 they will check everthing that can be checked with consult and give me a free wash and a vacume but I don't need either of the latter.

qship96
Posts: 6624
Joined: Sun Nov 24, 2002 11:31 am
Car: 1996 Q45

Re: buzzzing noise under the hood that can also be herd o ... (ppastos)

Postby qship96 » Thu May 08, 2008 11:32 am

"Free wash and vacuum" ? Sounds like they are giving you the lube and rear end special!

User avatar
maxnix
Posts: 22606
Joined: Mon Jul 22, 2002 8:11 pm
Car: 1995 Q45, 1995 Q45t, 2000 Q45

Re: buzzzing noise under the hood that can also be herd o ... (ppastos)

Postby maxnix » Thu May 08, 2008 2:34 pm

Do it yourself and treat yourself to a prime steak dinner out.

Do a little more reading and you will discover blue relays can be interchanged for testing. RTFSM.

User avatar
elwesso
Moderator
Posts: 34281
Joined: Sun Feb 23, 2003 4:52 pm
Car: 94 Q45t 5 speed, 2007 BMW M Coupe, 2007 G35S 6MT
Location: Indiana
Contact:

Re: buzzzing noise under the hood that can also be herd o ... (qship96)

Postby elwesso » Fri May 09, 2008 4:27 am

qship96 wrote:"Free wash and vacuum" ? Sounds like they are giving you the lube and rear end special!
LOL!! Its only good if theres a happy ending!!

Do you have any issues with the TCS or any other usual things, or is there just a noise? When the TCS actuator goes bad they often start buzzing..

User avatar
Infinitiguy19
Posts: 7756
Joined: Sat Dec 22, 2007 4:58 pm
Car: 1993 Infiniti Q45 188580 Miles
1994 Infiniti Q45a 240000 Miles

Re: buzzzing noise under the hood that can also be herd o ... (elwesso)

Postby Infinitiguy19 » Fri May 09, 2008 5:17 pm

Well sometimes the dash says SLIP when I put it in reverse and drive but only sometimes but other than that the TCS works fine, Bu that could be attributed to a bad brake caliper that's sticking in the front right side that will be replaced next week. Don't worry I will buy two and get new pads and rotors for even wear AGAIN.

User avatar
maxnix
Posts: 22606
Joined: Mon Jul 22, 2002 8:11 pm
Car: 1995 Q45, 1995 Q45t, 2000 Q45

Re: buzzzing noise under the hood that can also be herd o ... (ppastos)

Postby maxnix » Fri May 09, 2008 5:27 pm

And high temperature lube for the pins!

Having a shim kit on hand is always good.

User avatar
Evanarc
Posts: 49
Joined: Sat Jan 26, 2008 6:11 am
Car: Roarin'94 Infiniti Q45
Contact:

Re: buzzzing noise under the hood that can also be herd o ... (ppastos)

Postby Evanarc » Fri May 09, 2008 6:49 pm

i was havin the same problem a while ago after i unplugged the abs relay (the black box under the black bok lol) it stopped, maybe try that if all else fails

User avatar
Infinitiguy19
Posts: 7756
Joined: Sat Dec 22, 2007 4:58 pm
Car: 1993 Infiniti Q45 188580 Miles
1994 Infiniti Q45a 240000 Miles

Re: buzzzing noise under the hood that can also be herd o ... (Evanarc)

Postby Infinitiguy19 » Sat Nov 22, 2008 7:15 pm

I hate to bring up an old topic.

But its still there when I press the down on the throttle when the ignition is on and the car is off, could this have anything to do with a throttle position sensor being bad?

And I checked the ABS relay and its good.

If it makes a difference I hear a ticking noise when the engine is cold but when its warmed up its till their but its quieter.

It sounds like an injector ticking noise because I know its not the HLA's or the timing chain. I also OHM'ed the injectors and there all at 12.xx.

User avatar
Q451990
Moderator
Posts: 11059
Joined: Tue Jul 23, 2002 8:21 am
Car: 1990 Q45 - 114K, 2017 Toyota 4 Runner, 2004 Frontier M/T - 95K, 2012 Xterra (Mom's), 2017.5 Rogue (Inlaws)
Location: Columbia, SC
Contact:

Re: buzzzing noise under the hood that can also be herd o ... (ppastos)

Postby Q451990 » Sat Nov 22, 2008 7:23 pm

I'm going to guess it's related to your TCS actuator? Have you tried listening for the noise under the hood while moving the accelerator cable by hand at the throttle body?

Heath

User avatar
Infinitiguy19
Posts: 7756
Joined: Sat Dec 22, 2007 4:58 pm
Car: 1993 Infiniti Q45 188580 Miles
1994 Infiniti Q45a 240000 Miles

Re: buzzzing noise under the hood that can also be herd o ... (Q451990)

Postby Infinitiguy19 » Sat Nov 22, 2008 7:30 pm

Yea and still can find it, I even bough a mechanics stethoscope and still nothing. I think I am dumb.

User avatar
Infinitiguy19
Posts: 7756
Joined: Sat Dec 22, 2007 4:58 pm
Car: 1993 Infiniti Q45 188580 Miles
1994 Infiniti Q45a 240000 Miles

Re: buzzzing noise under the hood that can also be herd o ... (Paul Wall)

Postby Infinitiguy19 » Mon Jan 26, 2009 6:46 pm

OK to clear things up if anyone is confused: When I have the car in PARK and the IGNITION ON, Well one day i accidentally pressed the gas pedal and I heard a buzzing noise coming from some where, So I pressed it again and it was a constant buzzing noise till you have the pedal all the way to the floor.

So is this buzzing noise from the engine bay normal with Ignition on and the car in park when you open the throttle a little bit?

Its not comiing from the TCS actuator, Injectors, Throttle position sensor, ABS relays or anywhere else I tried to listen to with the mechanics stethoscope.

User avatar
maxnix
Posts: 22606
Joined: Mon Jul 22, 2002 8:11 pm
Car: 1995 Q45, 1995 Q45t, 2000 Q45

Re: buzzzing noise under the hood that can also be herd o ... (Paul Wall)

Postby maxnix » Mon Jan 26, 2009 7:12 pm

Well, obviously it's not running or you would seriously stress the engine.

Maybe it's going into the flooded start mode?

Not sure what your concern is as this is not a normal mode of operation.

User avatar
Infinitiguy19
Posts: 7756
Joined: Sat Dec 22, 2007 4:58 pm
Car: 1993 Infiniti Q45 188580 Miles
1994 Infiniti Q45a 240000 Miles

Re: buzzzing noise under the hood that can also be herd o ... (maxnix)

Postby Infinitiguy19 » Mon Jan 26, 2009 7:21 pm

So its a ECM issue?

Could this have anything to do with a weak injector?

User avatar
94Q45Beast
Posts: 578
Joined: Mon Dec 01, 2014 9:07 am
Car: 1994 INFINITI Q45t w/HICAS
1992 INFINITI Q45
2017 INFINITI Q70S AWD BLACK ON BLACK
Location: ATL GA

Re: Buzzing noise under the hood towards the back of the eng

Postby 94Q45Beast » Tue Mar 03, 2015 9:57 pm

was this issue ever resolved? if so then How


Return to “Q45 Forum / Cima Forum”