My 1983 300d will run out of fuel well before the tank empties. I can see air entering system when it still has several gallons in tank. I removed the line at bottom of tank and did not see any problem. has anyone had this experience?

Sounds like someone reversed lines.Try reversing inlet and outlet lines.It might have been done as tank screen was clogged.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

X2

But how are you measuring the amount of fuel left in the tank? Are you using the gauge?

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Don't leave that there - I'll take it to bits!

X3

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1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
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1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

there is at least 5 gallons of fuel in the tank when it begins to act up. I find 3 lines on tank. One comes out the bottom and the other 2 go in the front of the tank and they are different sizes---hard to mix them up--any help is really appreciated.

Listen the lines under the tank are,a breather,return line,and to engine line.Open the hood and see if cigar hose is attached to top line.If not reverse the cigar to the top.
If it still does not work,your tank screen may be clogged,and needs clean with a tooth brush.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

Are you sure you actually have fuel in the tank? Sometimes the float in the fuel level sensor seizes in a position that makes you believe you have fuel when there is actually none.

There is also a possibility as the fuel level lowers in the tank. Gravity pressure falls off enough that air is sucked in somewhere. This if getting the lines checked for correct orientation does not do it.

Welcome to the forum!
try to make the title of your threads more descriptive of the problem...
as this is the mercedes diesel forum, ALL threads relate to a Mercedes diesel...

I renamed your thread for you.

please read the Thread Rules - Please read before posting!
in addition to rules, the thread has GREAT hints and tips for new members on post content by Our Larry Bible!

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1987 190D 2.5Turbo
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1987 300TD
1987 300TD
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Are you talking about the main filter or the pre filter?

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