Dumb Question: 1990 Jetta IDI - IDI Engine - VWDiesel.net The IDI, TDI, and mTDI source.

• Dumb Question: 1990 Jetta IDI by cervelorod on 30 Oct, 2011 12:56
• I am prepping my engine bay for a veg oil conversion, and there was some contraption bolted to the fuel filter bracket.  Had 2 wires coming out of it, and a couple of aneriods maybe.  It wasn't hooked to anything else, and the piece where the wires connected didn't seem to be attached to the main part of it.
  
  What is it, and what does it do??
  
  Thanks,
  Rod
  
  1990 VW Jetta 1.6IDI Turbo'ed
• #1 by R.O.R-2.0 on 30 Oct, 2011 12:56
• altitude compensation pieces?
• #2 by cervelorod on 30 Oct, 2011 14:37
• What would it hook to?  There is a nipple that did not have a hose on it, but it appears not to connect to the aneroid with wires.  Was there supposed to be a hose to the IP?  I cant find anything on the online fiche.
  
  Thanks!
  
  Rod
• #3 by R.O.R-2.0 on 30 Oct, 2011 15:36
• Quote from: cervelorod on 30 Oct, 2011 14:37

  What would it hook to?  There is a nipple that did not have a hose on it, but it appears not to connect to the aneroid with wires.  Was there supposed to be a hose to the IP?  I cant find anything on the online fiche.
  
  Thanks!
  
  Rod
  

  
  dont know, ive never seen a fully functioning alt comp setup in person.
• #4 by Grey_Smoke on 01 Nov, 2011 01:18
• do you have any pics?
• #5 by rs899 on 01 Nov, 2011 07:27
• Quote

  dont know, ive never seen a fully functioning alt comp setup in person.

  
  I have, but the vision disappeared when I rebuilt an old Mk1 IP and swapped it in and removed that mess.
  
  Yes, there is a hose that goes across from the sensor to the IP. I will have a look at the old IP and see if I remember...  Perhaps you really don't need a functioning altitude compensator in Eastern WA?  I certainly didn't in FL, where the highest point is 200ft....
• #6 by bajacalal on 02 Nov, 2011 01:23
• Fuel heater maybe?