Low RPM smoke - IDI Engine - VWDiesel.net The IDI, TDI, and mTDI source.

• Low RPM smoke by trev on 25 Apr, 2010 13:24
• Changed my boost pump over to my spare, due to a worn throttle shaft bushing and leak.
  
  The spare came off a 91 1.6TD, my car is a 90 1.6TD, so I wasn't expecting too much in the way of difficulties.
  
  Driving it for the past few weeks, though, I have not got t set up quite like I'd like it to be...
  
  So. Runs well, starts well, idles a bit higher than I'd like, but not high enough that I've bothered to make changes there.
  
  Mostly, it's about the smoke. Under low loads, starting off the line in traffic and all, unless I really nurse it, I get huge amounts of black smoke until the revs come up.
  
  Can someone suggest where to start?
  
  Am I looking at playing with the LDA, adjusting something else?
  
  Thanks!
  
  Cheers
    Trev
• #1 by rabbid79 on 25 Apr, 2010 14:59
• Quote

  I get huge amounts of black smoke until the revs come up

  And presumably until the boost comes up?  Yes, I'd say your LDA is overfueling a bit.  Try backing it off a little.
• #2 by trev on 26 Apr, 2010 12:12
• I'll give it a go.
  
  Some fun. Get to pick out the yellow paint. Bleh.
  
  
  
  Thanks!
  
  Cheers
    Trev