Little Fuel Pump Problem - Troubleshooting - VWDiesel.net The IDI, TDI, and mTDI source.

• Little Fuel Pump Problem by WishIHadaRabit on 08 May, 2005 13:16
• My car seems to miss a little at low rpm, (less with the new nozzles)
  like if I'm not getting full detonation in one cylinder.
  
  And also my idle jumps from 1100rpm to 800rpm and vice-versa (slowly goes up and stays there a while, then slowly backs down).
  I had this problem before I changed my nozzles.
  I did a compression test at the same time and that's good
  (430psi across all 4)
  
  I'm pretty sure it's a pump problem.
  Has anybody had this problem and fixed it?
  I'm wondering if it's an easy fix that I could do myself?
  
  Thanks
• #1 by chrissev on 08 May, 2005 20:01
• Quote from: "WishIHadaRabit"

  My car seems to miss a little at low rpm, (less with the new nozzles)
  like if I'm not getting full detonation in one cylinder.
  
  And also my idle jumps from 1100rpm to 800rpm and vice-versa (slowly goes up and stays there a while, then slowly backs down).
  I had this problem before I changed my nozzles.
  I did a compression test at the same time and that's good
  (430psi across all 4)
  
  I'm pretty sure it's a pump problem.
  Has anybody had this problem and fixed it?
  I'm wondering if it's an easy fix that I could do myself?
  
  Thanks

  
  
  check the pump timing with  a dial gauge.
• #2 by WishIHadaRabit on 08 May, 2005 21:50
• I had the pump timed at a friend VW shop, just to be sure that was not the problem.
  
  thanks
• #3 by chrissev on 09 May, 2005 12:46
• Quote from: "WishIHadaRabit"

  I had the pump timed at a friend VW shop, just to be sure that was not the problem.
  
  thanks

  
  
  air in your feed line?
• #4 by WishIHadaRabit on 09 May, 2005 12:54
• no bubbles at all