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Author Topic: MCI-9 Fuel tank question  (Read 3192 times)

Offline Kwajdiver

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MCI-9 Fuel tank question
« on: May 18, 2008, 07:37:51 PM »
Yesterday as I was putting a few drops (all I could afford) of fuel in the tank.  I heard a motor running, in the fuel tank area, that I have never heard before.  Really hear it well when the fuel tank door is open.  Checked all my switches, nothing effected this.  Is there a fuel pump in there somewhere that is getting ready to bite the big one on me?  If not, what could this be.



As always, thanks for the help.

Bill
St. Petersburg, Florida
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Offline Nick Badame Refrig/ACC

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Re: MCI-9 Fuel tank question
« Reply #1 on: May 18, 2008, 07:45:24 PM »
Hi Bill,

No, not that I know of....

Was the bus running?  If so, it may have been the return line from the engine making the sound. The presure is quite strong

comming back to the tank.

Good Luck
Nick-
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Offline bowmaga

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Re: MCI-9 Fuel tank question
« Reply #2 on: May 19, 2008, 06:17:51 AM »
I've heard the same thing on my bus.  Bus was always running when I heard it, but I to, also assumed it was a fuel pump. 
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Greg Bowman
1979 MCI MC9

Offline Kwajdiver

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Re: MCI-9 Fuel tank question
« Reply #3 on: May 19, 2008, 06:23:45 PM »
Yes, Nick,  bus was running.  It sounded like a blower or pump.

Bill
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Auburndale, Florida
MCI-9
V-6-92 Detroit, Allison 5 spd auto
Kwajalein Atoll, RMI

Offline Nick Badame Refrig/ACC

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Re: MCI-9 Fuel tank question
« Reply #4 on: May 19, 2008, 06:35:07 PM »
Hi bill,

I had my bus running today, it's definitely the return line..

I felt it and it was vibrating pretty strong and sounded like an electric pump.

Aluminum tanks must intensify the sound.

Good Luck
Nick-
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Offline Kwajdiver

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Re: MCI-9 Fuel tank question
« Reply #5 on: May 21, 2008, 07:37:42 PM »
Now I wonder if something is working loose, or I just didn't "hear" it before.

Bill
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Auburndale, Florida
MCI-9
V-6-92 Detroit, Allison 5 spd auto
Kwajalein Atoll, RMI

Sojourner

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Re: MCI-9 Fuel tank question
« Reply #6 on: May 21, 2008, 09:54:03 PM »
Whenever fuel level is very low...it will make rumbling sound from large aluminum tank's side walls as well return line gear pump noise. As long you don't hear metallic noise such as large side panel viberating against near by metal framing....I wouldn't worry about it. Nearly empty tank turn into a "speaker" when you open fuel cap.

My does whenever fuel is low level.

FWIW

Sojourn for Christ, Jerry
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Offline Kwajdiver

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Re: MCI-9 Fuel tank question
« Reply #7 on: May 22, 2008, 05:56:03 PM »
Thanks for the info....  Just for the record,,, My tank is 3/4 full.  For the time being, guess I won't worry about it.

Bill
St. Pete
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Auburndale, Florida
MCI-9
V-6-92 Detroit, Allison 5 spd auto
Kwajalein Atoll, RMI

Offline buswarrior

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Re: MCI-9 Fuel tank question
« Reply #8 on: May 23, 2008, 07:14:50 PM »
Why would one burn fuel, for no forward movement, while sitting at the fuel pumps, filling the tank?

Another fright that would have been avoided...

happy coaching!
buswarrior
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Offline Kwajdiver

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Re: MCI-9 Fuel tank question
« Reply #9 on: May 23, 2008, 07:27:37 PM »
I was only pumping 25 gallons, that's all I could afford... :-\   Doesn't take long to pump 25 gallons. Not worth turning off the motor.

Bill
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Auburndale, Florida
MCI-9
V-6-92 Detroit, Allison 5 spd auto
Kwajalein Atoll, RMI
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