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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!!!!!!

The buzzing noise us you electric fuel lift pump.

(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.

(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!!!!

(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...

(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.