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n75

  1. Engine & Gearbox
    Hello all, I'd appreciate some assistance as I'm at the limit of my technical ability with this one; VW T5 2008 1.9L BRR engine. Engine emissions light came on after the van stood still for 2 weeks (cheers COVID). This was accompanied by a huge loss of boost (like none) and the turbo isn't...
  2. Technical Threads
    Hello all, I'd appreciate some assistance as I'm at the limit of my technical ability with this one; VW T5 2008 1.9L BRR engine. Engine emissions light came on after the van stood still for 2 weeks (cheers COVID). This was accompanied by a huge loss of boost (like none) and the turbo isn't...
  3. Engine & Gearbox
    Hi All, after reading many discussions on the N75 I have come to the conclusion that mine is goosed and that is the cause of my low power. I have a 2.5tdi ACV. Looking at buying a new one and they are expensive! There seems to be a lot of "alternatives" which are a lot cheaper. So my...
  4. Engine & Gearbox
    Just fitted a new N75 valve to stop the blooming mooing. Everything works fine- in fact better than fine, really happy. However the valve is ticking- as the rpm increases so does the ticking. It doesn't seem to tick when idle, only when the engine rpm is increased. I can hear it clearly in the...
  5. Engine & Gearbox
    Hi all, Was hoping for a bit of help and have read through quite a few of the posts on here and they have been v.useful so thanks in advance. Just bought a VW T4 2.5tdi 2002 (Hightop camper conversion) from a dealer. Driven it to Germany and we have noticed we get white smoke when driving and...
  6. Engine & Gearbox
    Hi everyone, firstly, thank you for maintaining this wonderful forum and for all the effort which went into writing those great"fix it yourself" guides!!!T: Secondly, I recently bought a 2.5 TDI AVS 1997 and I have been feeling like it was lacking some severe power, was going up the hills...
  7. Engine & Gearbox
    Hello, my2003 t4 102bhp is not boosting...sent it to the garage and they have said ECU has no signal to N75 and said I need a new ECU but took it home and scanned it myself and I managed to clear all faults but still no boost can anyone help with it? just done a scan of my van and it's showing...
  8. Engine & Gearbox
    Hello. I have a quick question. What size are the hoses that connect to the N75 valve on an AXD engine? I would like to buy some silicone replacements but a search of this site didn't produce anything. Many thanks Julia :)
  9. Engine & Gearbox
    Diagram and part numbers/descriptions for this valve for your reference - remember this is an 08 Caravelle, 2.5tdi 130PS, AXD/BNZ engine (?) with part numbers linked to this particular chassis number. So check yours first. http://www.vwt4forum.co.uk/album.php?albumid=23810 Lots of names for...
  10. Engine & Gearbox
    Hi everyone, I've been a member for a while now and often look through the posts and have always found the pool of knowledge pretty impressive so I thought I'd test the waters myself and see what everyone has to say! VAN: '01 T4 2.5 Tdi Particulate Filter fitted (to comply with London...
  11. Engine & Gearbox
    Hi I have a 2007 2.5TDI T5 4motion Been having overboost/turbo probs which I've posted about previously. I don't have the time or skill to diagnose the problem myself so have left it in the hands of a local specialist. He has changed the n75 valve and the turbo but the van still goes into limp...
  12. Engine & Gearbox
    Does anyone know at what pressure the wastegate should start to move on a 2.5TDi AJT engine please?
  13. Engine & Gearbox
    My T4 goes very well indeed as it comes up to the 380k mile mark, but: At 3000 rpm (in 5th) on the motorway and going up hill the power suddenly drops off and the van slows (disconcerting on overtaking). Also, I tow a horse trailer and have done for several years, again on pulling up hill (not...
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