KA24DE Weird Buzzing Won't Start - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

JEFFSOBOMB · 09-25-2011, 02:13 PM

Hey guys. I'm running a stock KA on a 1996 s14.
As the title says, my car starts making this weird buzzing sound when the key is turned to the "on" position. It sounds like it's coming from under the dash of the passenger's side. Then I try starting it and all I get are cranks.
The electronics start to go weird too and occasionally the gauges randomly go up and down.

This happened today, as I was driving home. I turned my car on, heard a really light buzz and started it. It was fine, until the engine stopped as I was driving 15mph.

Tried jump starting the car, but it didn't help.

Any suggestions on what it could be?

JEFFSOBOMB · 09-25-2011, 06:47 PM

Okay, so after checking my fusebox, I saw that the 7.5 EGI fuse was blown out. I tried replacing it, but I still had the same buzzing sound on the "ON" position.
Seems the buzzing is coming from the ECU right under the glovebox on the passenger side. Can I get someone's perspective on this?

91ka24de · 09-25-2011, 07:04 PM

have you tried resetting the ecu by disconnecting the battery for a few minutes

JEFFSOBOMB · 09-25-2011, 09:04 PM

Yeah, same outcome.

91ka24de · 09-25-2011, 09:07 PM

is it buzzing at the ecu or at the blower/blower motor?

JEFFSOBOMB · 09-25-2011, 10:01 PM

It's buzzing at the ECU. I'm thinking that it could be some relays that need replacement. I mean, the car turns on just fine, but I feel no powers going to the ECU. Just an educated guess though.

And if it turns out they are the relays, which ones should I take a look at?

Also, I tested it one more time, and whenever I put in a new 7.5 EGI fuse, it blows when the ignition is turned to "on."

Second question would be, what's causing it to constantly happen?

91ka24de · 09-25-2011, 11:17 PM

could be a short somewhere or a bad ground. check your grounds and check for bare wires it shouldn't pop like that and wont for no reason. thats what i would check first to be honest. thats just based off what i learned working in shops.

n8RPS13 · 09-25-2011, 11:28 PM

Yeah it sounds like something is either grounding out or there is something shorting out and causing you to keep blowing out that fuse...crossed wires bad ground, could be anything with that vauge description. Start tracing your wires see if anything is bare and touching metal, and get a wire tester and a voltage meter. Hope this helps buddy

JEFFSOBOMB · 09-25-2011, 11:48 PM

I will check it tomorrow. I'll try to be more detailed as well, i'm still learning my way around my car. Thanks.

nismoracingsx · 09-26-2011, 12:53 PM

why don't you start by checking the relay that fuse is protecting >.>
my egi relay shorts when it gets too hot and my car shuts off

vas570sx · 09-26-2011, 01:09 PM

same thing happened to me about a month ago. it ended up being a bad battery.

youre prolly looking at this post with a raised brow, but believe it or not, it fixed the problem.

it wouldnt take a jump, it wouldn't take a charge, i replaced it and the buzzing stopped and the car has been fine since..

JEFFSOBOMB · 09-27-2011, 01:13 PM

It wouldn't explain the blown fuses though, would it?

JEFFSOBOMB · 09-27-2011, 02:21 PM

Also, which one exactly is the EGI Relay? Location? I've been looking this up and can't find sh**.

modulation · 09-27-2011, 05:01 PM

Quote:

Originally Posted by JEFFSOBOMB

Also, which one exactly is the EGI Relay? Location? I've been looking this up and can't find sh**.

The EFI and Fuel Pump relay are in the box next to the battery on a S13. I'm not sure about where on a s14 but I would say they are under the hood in under a black box. They are normally blue or green squares.

I'd also check the corrision on your battery terminals, and try a jump start.

bp057 · 09-27-2011, 05:59 PM

Had this problem once in mine, was a bad battery. Parts shop should test it for free.

JEFFSOBOMB · 09-27-2011, 10:54 PM

Batteries fine. It's not the issue.

And yeah, @Modulation, that would generally be where some relays are located, but I still don't know which one is the EGI/EFI/ECCS relay that links to the ECU as well as the 7.5 EGI fuse. As for checking the wires, I don't know where to start.

91ka24de · 09-27-2011, 11:12 PM

grounds is the start usually, anything bolted or screwed to the car, next go to wearable points near engine/torque spots, firewall entry points, plugs

digitalhero1 · 09-29-2011, 09:11 PM

um id say check the volts on ur battery,
and check ur alt fuse, should be a 75 amp i think, it happend to me before and replaced both and noise was gone and started fine.

stawrs · 12-25-2011, 09:59 AM

i used to have that weird buzz i was just having a bad connection to the battery.. i shaved the poles and got me a good connection and buzzing was gone..

09-25-2011, 02:13 PM	#1
JEFFSOBOMB Leaky Injector Join Date: Mar 2011 Location: AC Posts: 62 Trader Rating: (2) Feedback Score: 2 reviews	KA24DE Weird Buzzing Won't Start Hey guys. I'm running a stock KA on a 1996 s14. As the title says, my car starts making this weird buzzing sound when the key is turned to the "on" position. It sounds like it's coming from under the dash of the passenger's side. Then I try starting it and all I get are cranks. The electronics start to go weird too and occasionally the gauges randomly go up and down. This happened today, as I was driving home. I turned my car on, heard a really light buzz and started it. It was fine, until the engine stopped as I was driving 15mph. Tried jump starting the car, but it didn't help. Any suggestions on what it could be? __________________

09-25-2011, 06:47 PM	#2
JEFFSOBOMB Leaky Injector Join Date: Mar 2011 Location: AC Posts: 62 Trader Rating: (2) Feedback Score: 2 reviews	Okay, so after checking my fusebox, I saw that the 7.5 EGI fuse was blown out. I tried replacing it, but I still had the same buzzing sound on the "ON" position. Seems the buzzing is coming from the ECU right under the glovebox on the passenger side. Can I get someone's perspective on this? __________________

09-25-2011, 09:04 PM	#4
JEFFSOBOMB Leaky Injector Join Date: Mar 2011 Location: AC Posts: 62 Trader Rating: (2) Feedback Score: 2 reviews	Yeah, same outcome. __________________

09-25-2011, 10:01 PM	#6
JEFFSOBOMB Leaky Injector Join Date: Mar 2011 Location: AC Posts: 62 Trader Rating: (2) Feedback Score: 2 reviews	It's buzzing at the ECU. I'm thinking that it could be some relays that need replacement. I mean, the car turns on just fine, but I feel no powers going to the ECU. Just an educated guess though. And if it turns out they are the relays, which ones should I take a look at? Also, I tested it one more time, and whenever I put in a new 7.5 EGI fuse, it blows when the ignition is turned to "on." Second question would be, what's causing it to constantly happen? __________________ Last edited by JEFFSOBOMB; 09-25-2011 at 10:35 PM..

09-25-2011, 11:28 PM	#8
n8RPS13 Zilvia FREAK! Join Date: Sep 2009 Location: New Smyrna Beach Posts: 1,296 Trader Rating: (22) Feedback Score: 22 reviews	Yeah it sounds like something is either grounding out or there is something shorting out and causing you to keep blowing out that fuse...crossed wires bad ground, could be anything with that vauge description. Start tracing your wires see if anything is bare and touching metal, and get a wire tester and a voltage meter. Hope this helps buddy __________________ WASTED I AM!

09-25-2011, 07:04 PM	#3
91ka24de Join Date: Sep 2011 Location: Caronport, Saskatchewan Age: 39 Posts: 34 Trader Rating: (0) Feedback Score: 0 reviews	have you tried resetting the ecu by disconnecting the battery for a few minutes

09-25-2011, 09:07 PM	#5
91ka24de Join Date: Sep 2011 Location: Caronport, Saskatchewan Age: 39 Posts: 34 Trader Rating: (0) Feedback Score: 0 reviews	is it buzzing at the ecu or at the blower/blower motor?

09-25-2011, 11:17 PM	#7
91ka24de Join Date: Sep 2011 Location: Caronport, Saskatchewan Age: 39 Posts: 34 Trader Rating: (0) Feedback Score: 0 reviews	could be a short somewhere or a bad ground. check your grounds and check for bare wires it shouldn't pop like that and wont for no reason. thats what i would check first to be honest. thats just based off what i learned working in shops.

09-25-2011, 11:48 PM	#9
JEFFSOBOMB Leaky Injector Join Date: Mar 2011 Location: AC Posts: 62 Trader Rating: (2) Feedback Score: 2 reviews	I will check it tomorrow. I'll try to be more detailed as well, i'm still learning my way around my car. Thanks. __________________

09-26-2011, 12:53 PM	#10
nismoracingsx Zilvia Addict Join Date: Sep 2007 Location: Alachua, FL Age: 38 Posts: 969 Trader Rating: (32) Feedback Score: 32 reviews	why don't you start by checking the relay that fuse is protecting >.> my egi relay shorts when it gets too hot and my car shuts off __________________

09-26-2011, 01:09 PM	#11
vas570sx Zilvia Addict Join Date: Jun 2008 Location: west palm beach Posts: 844 Trader Rating: (0) Feedback Score: 0 reviews	same thing happened to me about a month ago. it ended up being a bad battery. youre prolly looking at this post with a raised brow, but believe it or not, it fixed the problem. it wouldnt take a jump, it wouldn't take a charge, i replaced it and the buzzing stopped and the car has been fine since.. __________________

09-27-2011, 01:13 PM	#12
JEFFSOBOMB Leaky Injector Join Date: Mar 2011 Location: AC Posts: 62 Trader Rating: (2) Feedback Score: 2 reviews	It wouldn't explain the blown fuses though, would it? __________________

09-27-2011, 02:21 PM	#13
JEFFSOBOMB Leaky Injector Join Date: Mar 2011 Location: AC Posts: 62 Trader Rating: (2) Feedback Score: 2 reviews	Also, which one exactly is the EGI Relay? Location? I've been looking this up and can't find sh**. __________________

09-27-2011, 05:59 PM	#15
bp057 Zilvia Member Join Date: Nov 2004 Location: Rancho Santa Margarita, ca Age: 46 Posts: 237 Trader Rating: (2) Feedback Score: 2 reviews	Had this problem once in mine, was a bad battery. Parts shop should test it for free.

09-27-2011, 10:54 PM	#16
JEFFSOBOMB Leaky Injector Join Date: Mar 2011 Location: AC Posts: 62 Trader Rating: (2) Feedback Score: 2 reviews	Batteries fine. It's not the issue. And yeah, @Modulation, that would generally be where some relays are located, but I still don't know which one is the EGI/EFI/ECCS relay that links to the ECU as well as the 7.5 EGI fuse. As for checking the wires, I don't know where to start. __________________

09-27-2011, 11:12 PM	#17
91ka24de Join Date: Sep 2011 Location: Caronport, Saskatchewan Age: 39 Posts: 34 Trader Rating: (0) Feedback Score: 0 reviews	grounds is the start usually, anything bolted or screwed to the car, next go to wearable points near engine/torque spots, firewall entry points, plugs

09-29-2011, 09:11 PM	#18
digitalhero1 Join Date: Oct 2010 Location: Fresno Age: 37 Posts: 4 Trader Rating: (0) Feedback Score: 0 reviews	um id say check the volts on ur battery, and check ur alt fuse, should be a 75 amp i think, it happend to me before and replaced both and noise was gone and started fine.

12-25-2011, 09:59 AM	#19
stawrs Join Date: Oct 2011 Location: Lake Providence, Louisiana Posts: 10 Trader Rating: (0) Feedback Score: 0 reviews	i used to have that weird buzz i was just having a bad connection to the battery.. i shaved the poles and got me a good connection and buzzing was gone..