How do I know which 1.5 timing setting to use? There are two - IDI Engine - VWDiesel.net The IDI, TDI, and mTDI source.

• How do I know which 1.5 timing setting to use? There are two by rumbling_caddy on 21 May, 2013 15:54
• 
  I have a 1.5D engine with the original injection pump.  Not sure where to look for the "yellow dot"
  Initial IP timing was set at 1.00mm, but it felt weak.   I bumped it up to 1.20mm and it feels better,
  but I'm not sure if Im over doing it.
  
  From Vincent excelling IDI injection timing guide:
  
      Early Chassis:  (1977-1983)
  
      1.5l non-turbo 1977-1980                                        0.88 +/- 0.05 mm
  
      1.5l non-turbo 1980 with yellow dot                         1.15 +/- 0.05 mm
• #1 by RabbitJockey on 21 May, 2013 16:01
• There will be yellow smeared all over the lower timing advance piston cover on the front side of the pump.  It sounds like u have a yellow for pump tho,  what's the part number on it?
• #2 by burn_your_money on 21 May, 2013 16:02
• If it's not clacking like crazy you got it right.
• #3 by rumbling_caddy on 21 May, 2013 19:49
• Quote from: RabbitJockey on 21 May, 2013 16:01

  There will be yellow smeared all over the lower timing advance piston cover on the front side of the pump.  It sounds like u have a yellow for pump tho,  what's the part number on it?
  

  
  
  
  Can't see any yellow paint anywhere but the 1.5D is running better at 1.20 and not clacking like crazu
• #4 by fatmobile on 22 May, 2013 00:35
• Then advance it a little more.
   They are just numbers, might as well scribe a mark and use that as a referance.
• #5 by RabbitJockey on 22 May, 2013 04:33
• checked an old vw diesel parts thread, and hagar says 107a is the correct number for a yellow dot pump.  and like everyone else says if its running good where u have theres no reason to change.