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1996 Volkswagen Jetta

Question: Checking on the Code

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jettadwn16v, 4 Cylinder, Sterling, VA, March 04, 2009, 09:02

 Rookie

I keep getting a P0303 and P0440

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• Answer #1

  spyder March 04, 2009, 13:31
  

   Journeyman

  P0303 references a misfire on #3 cylinder. Ignition faults including spark plugs , cables , distributor cap and rotor are common problems.
  P0440 is a malfunction in the evap system. Items to check include gas cap (is it loose?) , evap purge valve ( leaking or blocked internally) and plumbing/hoses to fuel tank.
  Any place fuel vapors can escape is basically involved.
  There are specific devices known as "evap testers" or "smoke testers" to find small leaks.
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