[Vwdiesel] need fuel pump to keep engine running?

[Kevin]

Maybe someone can answer this question.  I recently
picked up an 82 Diesel Vanagon that has sat for about
5 years.  I do not know how old the fuel is.  I did
replace the fuel filter. 
 To get it to run and stay running I have had to add a
small fuel pump between the filter and the Injection
Pump.  The small pump came with the Vanagon so the
previous owner must of had problems but who knows how
long ago that was (the pump was just laying in the
back and really wasn't hooked up).  Is there something
wrong with the Injection Pump? Is the fuel bad,
although the engine runs great with the small fuel
pump in line.
 Any help would be appreciated.  Once I get this
solved I send my next problem.
Kevin 

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