Humming Noise With Key Turn On
01-18-2017, (Subject: Humming Noise With Key Turn On ) 
Post: #1
Humming Noise With Key Turn On
After I start my truck isx 871 prostar and cut the truck off and turn the key on. I can hear aloud buzzing or wining noise, it seem to become from IFMS but I am not for sure t. I have replace the gear pump about 3 weeks ago... Thank you in advance for your input!!!!!!


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01-18-2017, (Subject: Humming Noise With Key Turn On ) 
Post: #2
RE: Humming Noise With Key Turn On
The buzzing noise us you electric fuel lift pump.


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 Thanks given by: fargonaz , rgreen
01-18-2017, (Subject: Humming Noise With Key Turn On ) 
Post: #3
RE: Humming Noise With Key Turn On
(01-18-2017 )hhow55 Wrote:  The buzzing noise us you electric fuel lift pump.

Btw, the buzzing noise means it is working. Mine does the same.


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 Thanks given by: in2trux , Waterloo , rgreen
01-18-2017, (Subject: Humming Noise With Key Turn On ) 
Post: #4
RE: Humming Noise With Key Turn On
(01-18-2017 )hhow55 Wrote:  
(01-18-2017 )hhow55 Wrote:  The buzzing noise us you electric fuel lift pump.

Btw, the buzzing noise means it is working. Mine does the same.

I was going to say, I was will replace tomorrow but you said it means it working... Thank you!!!!


User's Signature: I stand on a square, I am always seeking light... Just old traveling man lost in the wilderness my compass is pointing me to the East!!!!
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01-19-2017, (Subject: Humming Noise With Key Turn On ) 
Post: #5
RE: Humming Noise With Key Turn On
(01-18-2017 )rgreen Wrote:  After I start my truck isx 871 prostar and cut the truck off and turn the key on. I can hear aloud buzzing or wining noise, it seem to become from IFMS but I am not for sure t. I have replace the gear pump about 3 weeks ago... Thank you in advance for your input!!!!!!

That would highly depend on what you are hearing.

Here is what a healthy electric fuel pump sounds like on a CM871. it is at 1:21 in the video...





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 Thanks given by: rgreen
01-19-2017, (Subject: Humming Noise With Key Turn On ) 
Post: #6
RE: Humming Noise With Key Turn On
(01-19-2017 )Rawze Wrote:  
(01-18-2017 )rgreen Wrote:  After I start my truck isx 871 prostar and cut the truck off and turn the key on. I can hear aloud buzzing or wining noise, it seem to become from IFMS but I am not for sure t. I have replace the gear pump about 3 weeks ago... Thank you in advance for your input!!!!!!

That would highly depend on what you are hearing.

Here is what a healthy electric fuel pump sounds like on a CM871. it is at 1:21 in the video...




Thank Rawze that how mine sound.


User's Signature: I stand on a square, I am always seeking light... Just old traveling man lost in the wilderness my compass is pointing me to the East!!!!
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