hybrid isuzu/cummins pump finished! - page 3 - IDI Engine - VWDiesel.net The IDI, TDI, and mTDI source.

• #30 by truckinwagen on 03 Feb, 2011 15:01
• well, I retarded the timing to where the clatter at idle was almost eliminated, and now it hits the stumble and looses power at 3000RPM
  
  gonna time it in the middle for now, so it is more drivable(with a 3-speed I need to rev past 3K alot) and then get the softer spring for the advance to fix the problem outright.
  
  -Owen
• #31 by truckinwagen on 03 Feb, 2011 18:20
• that I did not swap over, and it is easy to do(not hidden by the intake manifold)
  I'll try that.
  
  I did clearance my spare timing spring cover(to allow more total timing advance) to go with the softer spring, if it comes to that.
  
  
  but to get to the timing advance cover I have to pull the pump, so I will wait until I get the green spring before I do that.
  
  -Owen
• #32 by truckinwagen on 03 Feb, 2011 20:48
• cool, thanks!
• #33 by rabbitman on 04 Feb, 2011 00:21
• Quote from: libbybapa on 03 Feb, 2011 18:03

  Which pressure regulator did you use?  They are specific to the plunger size so you'd need to use the cummins one.
  

  
  My gut feeling says that'll fix it
• #34 by truckinwagen on 04 Feb, 2011 16:39
• well, changed the regulator.
  it helped, but not much, moved the stumble from 3000 to 3250RPM
  
  gonna go forward with the softer advance spring.
  
  -Owen