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.

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.

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)

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..

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...........