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BMW E31 8 Series 1990-1994 (840i/Ci, 850i/Ci/CSi) Fuel Pump


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Last Post: Nov 2, 2012 2:12 AM Last Post By: Ardend
da1mrsdavis

Posts: 5
Registered: 09/02/06
Fuel Pump
Posted: Apr 3, 2007 1:34 PM
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I have a 1991 850 and am having problems with my fuel pump for cylinders 7-12. I heard you can change the fuel pump for 7-12 without changing 1-6 because it is the whole sending unit. Has anyone had to change their fuel pump and only changed one part.
Charlie

Posts: 4,776
Registered: 12/09/03
Re: Fuel Pump
Posted: Apr 3, 2007 2:42 PM   in response to: da1mrsdavis in response to: da1mrsdavis
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Looks liek the 850 uses only one fuel pump? Take a look at www.realoem.com. The other saide is a jet sucking pump which transfer fuel to the other lobe using a low-pressure (vacuum/venturii) principle. Check the hoses betweem the lobes.
Charlie

Posts: 4,776
Registered: 12/09/03
Re: Fuel Pump
Posted: Apr 3, 2007 2:43 PM   in response to: da1mrsdavis in response to: da1mrsdavis
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Looks like the 850 uses only one fuel pump? Take a look at www.realoem.com. The other saide is a jet sucking pump which transfer fuel to the other lobe using a low-pressure (vacuum/venturii) principle. Check the hoses betweem the lobes.
Ardend

Posts: 5
Registered: 10/31/12
Re: Fuel Pump
Posted: Nov 1, 2012 5:41 AM   in response to: da1mrsdavis in response to: da1mrsdavis
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I think you need to change entire clicking here

Edited by: Ardend on Nov 2, 2012 2:10 AM

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