exuast leaks,  bad injectors, poor timing, to rich of a mix. or as I have just found out, thefuel pressure regulator.  also the temp II sensor could be goin bad and cuase the engine to run rich.  take a look at your plugs too.
josh
85 GL "EVA"-comin home soon!!!
  ----- Original Message ----- 
  From: peter hargreave 
  To: vanagon@GERRY.VANAGON.COM 
  Sent: Monday, March 17, 2003 5:10 PM
  Subject: Causes of fuel inefficiency

  I have an 85 Westfalia.  Over the past year, my van has gone from about 400 km per tank to arround 230 km per tank.  It is not leaking gas and I have got the O2 sensor checked.  What else could cause such a drastic reduction in fuel efficiency?  If any one could help it would be greatly appreciated.  Besides being evironmentally unsound, gas has hit 91 here in BC.

  Thanks in advance.

  All the best, 

  Pete

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