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7 Series - E38 (1995 - 2001)

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  #1  
Old 07-24-2012, 07:37 PM
GeorgeJ3 GeorgeJ3 is offline
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Location: Nashville, TN.
 
Join Date: Jul 2012
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Mein Auto: 96 740il
96 740iL - Gas tank runs out on the half tank

I just bought my '96 740il.
The guy I bought it from says it can only go with a half tank. In other words when it gets to the half tank point, time to fill up. Fuel pump issue? I know it has two fuel pumps so one side must be bad.
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  #2  
Old 07-24-2012, 09:35 PM
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joyism5 joyism5 is offline
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Location: USA
 
Join Date: Jan 2011
Posts: 1,270
Mein Auto: '99 740IL, K75RT
It has only one fuel pump. It has 2 fuel level sending units. Maybe they are bad. Try to use some fuel injector cleaner or unlock your instrument cluster and Check how much fuel actually you have.Scroll down and read the thread 97 E38.
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Last edited by joyism5; 07-24-2012 at 09:40 PM.
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  #3  
Old 07-29-2012, 09:18 PM
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bluebee bluebee is offline
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Location: San Jose, California
 
Join Date: Mar 2008
Posts: 19,190
Mein Auto: 02 BMW 525i M54 automatic
The quarter tankers swear you must cover the fuel pump - but we have analyzed the situation - and many think that's an old wive's tale.

This is from the E39 bestlinks ... so let me know if it doesn't apply to the E38 as well:
- How large is the fuel tank and reserve in the E39 (1) & what gasoline to use (1) & how much gas should be left to cool the fuel pump (1)
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Note: Your mission, should you decide to accept it, is to add value to those threads, either by pictures or by descriptions, so the next person with the same problem stands on your shoulders.
See also: E39 Bestlinks & How to easily find what you need, in seconds!

Last edited by bluebee; 07-29-2012 at 09:20 PM.
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  #4  
Old 08-10-2012, 05:55 AM
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BMWFatherFigure BMWFatherFigure is offline
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Location: Perth, Western Australia
 
Join Date: Aug 2012
Posts: 1,908
Mein Auto: E23;E30;E38;E32;E34 +
How much gas do you pump in at 'half'? Is it only half a tank? If you are pumping in a 'full tank' the you have a sender unit problem. If you pump in 'half a tank' you have an internal tank problem of some kind. Work out which one it is and go on from there..............PS Covering the pumps etc etc all smoke and mirrors. The pump will pump out until it cannot (for some reason ) pump any more. That reason will not be the initial gas level..
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  #5  
Old 08-11-2012, 09:16 PM
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BMWFatherFigure BMWFatherFigure is offline
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Location: Perth, Western Australia
 
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Mein Auto: E23;E30;E38;E32;E34 +
Maybe I misunderstood the post. Does the car stop (out of gas) when the dash shows half? If yes see my prev post. if no what is the problem? If any...........
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