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Bus Discussion => Bus Topics ( click here for quick start! ) => Topic started by: Kwajdiver on May 18, 2008, 07:37:51 PM

Title: MCI-9 Fuel tank question
Post by: Kwajdiver 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
Title: Re: MCI-9 Fuel tank question
Post by: Nick Badame Refrig/ACC 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-
Title: Re: MCI-9 Fuel tank question
Post by: bowmaga 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. 
Title: Re: MCI-9 Fuel tank question
Post by: Kwajdiver on May 19, 2008, 06:23:45 PM
Yes, Nick,  bus was running.  It sounded like a blower or pump.

Bill
Title: Re: MCI-9 Fuel tank question
Post by: Nick Badame Refrig/ACC 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-
Title: Re: MCI-9 Fuel tank question
Post by: Kwajdiver 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
Title: Re: MCI-9 Fuel tank question
Post by: Sojourner 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
Title: Re: MCI-9 Fuel tank question
Post by: Kwajdiver 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
Title: Re: MCI-9 Fuel tank question
Post by: buswarrior 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
Title: Re: MCI-9 Fuel tank question
Post by: Kwajdiver 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