Passat loss of power

Discussion in 'Diesel' started by OxfordGTI, Mar 5, 2007.

  1. Matt82

    Matt82 Forum Addict

    Joined:
    Apr 26, 2006
    Likes Received:
    8
    Location:
    GTI Scene
    erm. i did mine years ago, i used a good wd40 type spray that i had at the time. with the hoses, you could maybe get new ones (make sure you mark which ones go to what... ive still got the diagram drawn on the wall of my garage in essex haha)

    the crud comes from the breather which joins the intake system just after the turbo. doesnt seem the brightest of ideas....
     
  2. OxfordGTI Forum Member

    Joined:
    Jan 4, 2006
    Likes Received:
    0
    Location:
    Oxford
    Right I changed the ignition switch last night and no go, car only really seems to start when it's being jumped started. Got it running last night by starting from my MK2 and the RAC got it started from a jump pack. Do these diesel take a lot of power to start? The battery seemed to be turning the car over ok. Got the car running then left it for about 1/2 hr came back switched it of the back on and nothing would this have been enough time to charge it. Very strange, I got the N75 out anyway you can insure this is actually working as it seems to be a sealed electronic part. When it was runnoing I took it for a drive and still the same power loss problem Thanks All
     
  3. OxfordGTI Forum Member

    Joined:
    Jan 4, 2006
    Likes Received:
    0
    Location:
    Oxford
    Anyone help please :- )
     
  4. Matt82

    Matt82 Forum Addict

    Joined:
    Apr 26, 2006
    Likes Received:
    8
    Location:
    GTI Scene
    they do take a lot of juice to start due to the high compression (IRO 20:1)

    the fact that its turning over ok is strange. are you sure your heater plugs are ok? i think there should be about 8 of them on those engines.

    if theyre not heating up properly, it will hard to get the diesel to burn.

    not sure exactly how to check those. on old fords you could get them out and clean up the tips which would prolong their lives for a few more months
     
  5. Seraph Banned

    Joined:
    Oct 17, 2004
    Likes Received:
    0
    Location:
    -5129' 57N-07 29W
    in that case, its not a PD engine from what i can see, so dont bother with any n75 - it doesnt have one.

    why did you change the starting switch(it cant be an ignition swtch on a diesel!)?

    did the AA test the battery?
     
  6. Matt82

    Matt82 Forum Addict

    Joined:
    Apr 26, 2006
    Likes Received:
    8
    Location:
    GTI Scene
    so what would the module be with the 3 vac hoses going to it that he found? my old 90bhp engine had one, the replacement part had n75 in the part number from what i can remember.
     
  7. Seraph Banned

    Joined:
    Oct 17, 2004
    Likes Received:
    0
    Location:
    -5129' 57N-07 29W
    wouldnt have thought the part no actually includes the component identifier - they tend to be two different things - could be a coincedent

    akaik, the n75 works specifically in conjunction with variable vane units, e.g. vtn17 ect, and these are found on the pd engines.

    either way, i think theres more going on with this passat than a turbo prob.
     
    Last edited: Mar 7, 2007
  8. OxfordGTI Forum Member

    Joined:
    Jan 4, 2006
    Likes Received:
    0
    Location:
    Oxford
    Switch

    The switch did not click back automatically so I replaced it, the RAC guy did not test the battery, cld this cause the starting problems? I assume the battery would not effect the running ? James
     
  9. Seraph Banned

    Joined:
    Oct 17, 2004
    Likes Received:
    0
    Location:
    -5129' 57N-07 29W
    nope

    you need more information really, otherwise guessing will get you nowhere
     
  10. Matt82

    Matt82 Forum Addict

    Joined:
    Apr 26, 2006
    Likes Received:
    8
    Location:
    GTI Scene
    but it will effect starting if the glow plugs are not heating up properly
     
  11. OxfordGTI Forum Member

    Joined:
    Jan 4, 2006
    Likes Received:
    0
    Location:
    Oxford
    How long running shld the battery take to charge if strong alternator and good battery ?
     
  12. Matt82

    Matt82 Forum Addict

    Joined:
    Apr 26, 2006
    Likes Received:
    8
    Location:
    GTI Scene
    why not charge it with a charger overnight? when a diesel is running, there is very little electrical drain, so a low battery wouldnt make the biggest difference.

    10-30 min drive should do, but you ought to charge it really
     
  13. OxfordGTI Forum Member

    Joined:
    Jan 4, 2006
    Likes Received:
    0
    Location:
    Oxford
    Hey All Took the car to the garage, they think it's a pump issue, if is totalled looking at 650 plus vat plus labour. It's a Bosch EDC 0460 part no pump. Anyone got any experiance of removing these units and replacing them. I wanna get it off myself then send it for refurbishment and see what happens any advice or help/ experiance with these would be great thanks all
     
  14. Matt82

    Matt82 Forum Addict

    Joined:
    Apr 26, 2006
    Likes Received:
    8
    Location:
    GTI Scene
    do you know how they came to that conclusion? i think every one of my A4s went into limp at least once in the time i had them (about 4-5 separate tdis) but none were pump problems, that doesnt sound like one of the more common faults.
     
  15. OxfordGTI Forum Member

    Joined:
    Jan 4, 2006
    Likes Received:
    0
    Location:
    Oxford
    Hey
    Long story 3 weeks and 350 miles ago my wife filled the car with petrol. did not start it called the rac and had the tank drained. Car all seemed good then started having these probs, garage called me up and told me the car had petrol in I told them what had happened. They guy has run the car from a seperate pure diesel source and still has the problem. They have run a laptop diagnostic and no faults. How can the pump be tested ? Appreciate yr reply James
     
  16. Matt82

    Matt82 Forum Addict

    Joined:
    Apr 26, 2006
    Likes Received:
    8
    Location:
    GTI Scene
    hmmm well, diesel is oily as you yknow, it acts as a lube for the pump. if you run petrol through a diesel engine, apart from other damage you end up with, the pumps can die because of the lack of lube.

    but you say it was never started right?
     
  17. Matt82

    Matt82 Forum Addict

    Joined:
    Apr 26, 2006
    Likes Received:
    8
    Location:
    GTI Scene
    ps petrol floats on top of diesel, hence even if you did run it, youd have to run the tank down to get to the petrol
     
  18. OxfordGTI Forum Member

    Joined:
    Jan 4, 2006
    Likes Received:
    0
    Location:
    Oxford
    Hey Matt
    The car was never started or run with petrol in, vehicle went and had the tank drained. The I ran the car and it was all fine I worry they did not drain it and it's started to come through the system. If it is the pump is it a ticky change ?
     
  19. Matt82

    Matt82 Forum Addict

    Joined:
    Apr 26, 2006
    Likes Received:
    8
    Location:
    GTI Scene
    not sure on that, never had to do that on one of mine.
     

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice