Humming Sound Around the Tailend?

chrismc101 · 12-16-2005, 10:16 AM

While my 86 is running & sitting idle, I hear a humming sound/noise around the tailend of the car. It is kinda annoying and I'm wondering, "What does that sound means?"

Anyone that can help me out, please do so. I want my 86 running perfectly. Even though I just bought her on last Sat and I have the rest of my living days to work on her; I want her to be functioning as she suppose to.

So, being that I hear this around the tailend (gas tank area) I really want to know wassup. Don't wanna be riding out and my joint blow up on me, lol... I laugh but I'm serious!

Help me out stangers...

HoodStrype · 12-16-2005, 10:20 AM

Fuel pump? Sounds like a turbine engine on a helicopter or an airplane?

chrismc101 · 12-16-2005, 12:13 PM

Fuel pump, ok. So, what kinda problem will I run into if I wait a while to change it out? Will it cause any problems? Will it hurt the performance of the car? More importantly, I ain't trying to blow myself up, lol...

Holla back stangers...

chrismc101 · 12-16-2005, 12:16 PM

But no, it doesn't sound like a helicopter; it's just a humming or buzzing type sound. Hope we're talking bout the same thing. I wanna get small but needed issues out of the way so I can start with my modifications. Thanks again for any/everybody's imput.

mpj76 · 12-16-2005, 01:26 PM

Yo, that's what its supposed to sound like. With the car off, put the key into the ignition and click it into the ON position. You'll hear the fuel pump buzz/hum for a second. The sound is continuous while running. If ever in the future your car stops running and you don't hear that sound, you know you've got a fuel delivery problem. Congrats on the new project.

chrismc101 · 12-16-2005, 02:54 PM

Well thank you for the imput. So, there is noway around this humming/buzzing sound. Just another question, "Is this the same on other year model?" Well I guess it really don't matter cause my concern is with my car. LOL... It was annoying, but now that I know it's proper with operation; I feel better.

Thanks for he input stangers...

mpj76 · 12-16-2005, 03:11 PM

Mine is a 91. Its been that way for since I got it.

~The Jester~ · 12-16-2005, 04:18 PM

Welcome to the wonderful world of fuel injection! Get used to it pal. If it's REALLY loud, fuel pump might be heading south, or all of the insulation in your tank straps is "squished" out.

Ask 82GT about fuel pump noise, then come listen to mine!

Oh wait, that's right. Mine doesn't make that noise anymore.

Ieatcamaros · 12-16-2005, 09:54 PM

If it's pretty loud or distinct, then I bet your pump is on it's way out. Some pumps are just plain noisy, though. Stick your ear up to the filler door and listen to the pump running while the engine is running. Is this the same sound you hear? Another thing is, your fuel pump is designed to come on when the key is turned on. It should run for about two seconds. This is priming the fuel lines. So sit in your car, turn the key on and listen for the pump to come on. If it primes for much more than 2-3 seconds, I'd be thinking about a new pump in the future. Especially if you count it again a week or two later and 2-3 seconds turns into 3-5 seconds.

chrismc101 · 12-17-2005, 07:43 AM

Cool, I'll check that out today my good peoples!

racerboy88 · 12-22-2005, 04:58 PM

if you need a new one, I was happy with the msd fuel pump. Took a couple of hours to replace and it came with all that you need

12-16-2005, 10:16 AM	#1
chrismc101 Registered Member Join Date: Dec 2005 Posts: 35	Humming Sound Around the Tailend? While my 86 is running & sitting idle, I hear a humming sound/noise around the tailend of the car. It is kinda annoying and I'm wondering, "What does that sound means?" Anyone that can help me out, please do so. I want my 86 running perfectly. Even though I just bought her on last Sat and I have the rest of my living days to work on her; I want her to be functioning as she suppose to. So, being that I hear this around the tailend (gas tank area) I really want to know wassup. Don't wanna be riding out and my joint blow up on me, lol... I laugh but I'm serious! Help me out stangers...

12-16-2005, 10:20 AM	#2
HoodStrype Rearview Mirror Haze Join Date: May 1999 Location: Huntsville, Alabama...a.k.a. "HuntsVegas" Posts: 387	Re: Humming Sound Around the Tailend? Fuel pump? Sounds like a turbine engine on a helicopter or an airplane? __________________ 93 lx Notch 01 GT ...the epitome of Murphy's Law

12-16-2005, 12:13 PM	#3
chrismc101 Registered Member Join Date: Dec 2005 Posts: 35	Re: Humming Sound Around the Tailend? Fuel pump, ok. So, what kinda problem will I run into if I wait a while to change it out? Will it cause any problems? Will it hurt the performance of the car? More importantly, I ain't trying to blow myself up, lol... Holla back stangers...

12-16-2005, 12:16 PM	#4
chrismc101 Registered Member Join Date: Dec 2005 Posts: 35	Re: Humming Sound Around the Tailend? But no, it doesn't sound like a helicopter; it's just a humming or buzzing type sound. Hope we're talking bout the same thing. I wanna get small but needed issues out of the way so I can start with my modifications. Thanks again for any/everybody's imput.

12-16-2005, 01:26 PM	#5
mpj76 Registered Member Join Date: Sep 2002 Posts: 158	Re: Humming Sound Around the Tailend? Yo, that's what its supposed to sound like. With the car off, put the key into the ignition and click it into the ON position. You'll hear the fuel pump buzz/hum for a second. The sound is continuous while running. If ever in the future your car stops running and you don't hear that sound, you know you've got a fuel delivery problem. Congrats on the new project. __________________ 91 Coupe: FMS 1 5/8 unqual shorty's, BBK off road X-pipe, Super Duty T5, Pro 5.0 short shifter, 2.73 rear, G3 alt, MSD coil, dist, no smog pump, oil cooler, 195K miles, 14 deg timing, 23 mpg city/29 mpg highway @ 65 mph.

12-16-2005, 02:54 PM	#6
chrismc101 Registered Member Join Date: Dec 2005 Posts: 35	Re: Humming Sound Around the Tailend? Well thank you for the imput. So, there is noway around this humming/buzzing sound. Just another question, "Is this the same on other year model?" Well I guess it really don't matter cause my concern is with my car. LOL... It was annoying, but now that I know it's proper with operation; I feel better. Thanks for he input stangers...

12-16-2005, 03:11 PM	#7
mpj76 Registered Member Join Date: Sep 2002 Posts: 158	Re: Humming Sound Around the Tailend? Mine is a 91. Its been that way for since I got it. __________________ 91 Coupe: FMS 1 5/8 unqual shorty's, BBK off road X-pipe, Super Duty T5, Pro 5.0 short shifter, 2.73 rear, G3 alt, MSD coil, dist, no smog pump, oil cooler, 195K miles, 14 deg timing, 23 mpg city/29 mpg highway @ 65 mph.

12-16-2005, 04:18 PM	#8
~The Jester~ Rat Killer Join Date: Aug 2002 Location: Cold ass Ohio Posts: 1,143	Re: Humming Sound Around the Tailend? Welcome to the wonderful world of fuel injection! Get used to it pal. If it's REALLY loud, fuel pump might be heading south, or all of the insulation in your tank straps is "squished" out. Ask 82GT about fuel pump noise, then come listen to mine! Oh wait, that's right. Mine doesn't make that noise anymore. __________________ d-Con Racing "Nothing fancy, just 347 inches of RAT POISON!" MICE need not apply.....

12-16-2005, 09:54 PM	#9
Ieatcamaros Domestic Rice really sucks! Join Date: Apr 2002 Location: KY Posts: 973	Re: Humming Sound Around the Tailend? If it's pretty loud or distinct, then I bet your pump is on it's way out. Some pumps are just plain noisy, though. Stick your ear up to the filler door and listen to the pump running while the engine is running. Is this the same sound you hear? Another thing is, your fuel pump is designed to come on when the key is turned on. It should run for about two seconds. This is priming the fuel lines. So sit in your car, turn the key on and listen for the pump to come on. If it primes for much more than 2-3 seconds, I'd be thinking about a new pump in the future. Especially if you count it again a week or two later and 2-3 seconds turns into 3-5 seconds. __________________ The sig says it all.

12-17-2005, 07:43 AM	#10
chrismc101 Registered Member Join Date: Dec 2005 Posts: 35	Re: Humming Sound Around the Tailend? Cool, I'll check that out today my good peoples!

12-22-2005, 04:58 PM	#11
racerboy88 Registered Member Join Date: Sep 2003 Location: British Columbia Posts: 123	Re: Humming Sound Around the Tailend? if you need a new one, I was happy with the msd fuel pump. Took a couple of hours to replace and it came with all that you need __________________ 1990 5.0 LX H/B H-pipe w/ flowmasters, Koni shocks and BBK springs.

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