disconnecting LDA hose - IDI Engine - VWDiesel.net The IDI, TDI, and mTDI source.

• disconnecting LDA hose by slorimer on 23 May, 2008 09:22
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  The injection pump on my 94 TD has diesel leaking from the breather port.  I was told this is due to an o-ring within the LDA leaking.  I have screwed in a spare fuel input barb so I can catch the fuel in a container.  However, since this started I have started to get heavy black smoke when I accelerate heavily, which is due to excessive fuel injected, I believe.  I was wondering, what would happen if I disconnected the hose from the turbo to the LDA.  So the pump wouldn't react to the boost pressure.  Would I risk engine damage, elevated temperatures?  Or just poor acceleration.  Anyone know, or done this before?  TIA
• #1 by Op-Ivy on 23 May, 2008 10:32
• Disconnecting the LDA hose will prevent the extra fuel being injected when the under boost. You will probably feel a lack of power, otherwise I can't think of any other negative effects.
• #2 by slorimer on 23 May, 2008 12:49
• thanks Op-Ivy.
  
  Or instead of disconnecting the line, should I adjust my max fuel screw so it doesn't through clouds of smoke out the back?
• #3 by Choppercat on 23 May, 2008 16:23
• Or simply turn the diaphragm/boost pin 180 degrees will do the same without having to disconnect anything. This way you don't have to worry about crap getting into places it doesn't belong. The rounded side of the boost-pin doesn't have any fuel enrichment capability.
• #4 by jtanguay on 23 May, 2008 17:10
• Quote from: "libbybapa"

  Or, maybe fix the o-ring so you don't ruin the LDA diaphragm.
  
  Andrew

  
  
  1x
  
  but if you must, make sure to block the pressure hose going to the LDA  :lol: