EM TuningSky Insurance
Results 1 to 23 of 23
  1. #1
    1st Gear

    Status
    Offline
    Join Date
    Feb 2007
    Posts
    144

    Hissing noise/ blowing air

    Hi guys,

    My car is a 98 tdi 110 afn engine.

    I have heard a hissing noise recently and thought it was the recirculator or egr thing.

    But upon inspection just now I noticed that it was around the injector no.1 (the one nearest the windscreen) and I can feel air blowing out of it. I undid the fuel pipe ontop bleed it a bit and retightned it properly, and I also made sure the housing clamp for the injector was fully tightened.
    But it is still blowing air and I am not sure how or why.

    Any help would be greatly appreciated.

  2. # ADS
    ADS
    Join Date
    Always
    Posts
    Many
     
  3. #2
    shineydave's Avatar
    5th Gear

    Status
    Offline
    Join Date
    Jan 2006
    Location
    Bradford, Yorkshire, UK
    Posts
    904
    sounds like it could be the "o" ring that seals the injector to the inlet manifold that's failed. it's prolly worth resealing all of them, if one's gone the others will be on the way out
    Dave

    "If that's the Turbo Fairy knocking tell Her I'm not in"

  4. #3
    Jimbo.King's Avatar
    1st Gear

    Status
    Offline
    Join Date
    Oct 2006
    Location
    Leeds
    Posts
    173
    You could check that the nut (6) on top of the bracket (3) that holds the injector into the cylinder head is tight enough (20NM)

    Failing that as shineydave said the seal (4) will need replacing.


    2007 A4 3.0tdi Quattro S-line, Lava Grey Pearl, 229+bhp, 6 speed manual, Cruise control, Auto wipers/lights, Parking sensors all round, RNS-E Sat Nav, Heated Volterra leather, Adaptive Bi-Xenon plus headlights, Bluetooth phone prep/voice control, DRL, i-Pod dock, Coming home lights, A4 B5 front spring seat mod, LED DRL/side light/numberplate lights, Window tints, Cupra R front splitter, Black front grill, 3.5" custom tail pipes, 8.5x19 Calibre Excalibre wheels running 225/40/19, ET30-R ET35-F.

  5. #4
    1st Gear

    Status
    Offline
    Join Date
    Feb 2007
    Posts
    144
    Yea it is the seal that needs replacing, lil ****er is only 6 months old!

  6. #5
    shineydave's Avatar
    5th Gear

    Status
    Offline
    Join Date
    Jan 2006
    Location
    Bradford, Yorkshire, UK
    Posts
    904
    "looks like you blew a seal"

    "nope, i've been eating ice-cream"
    Dave

    "If that's the Turbo Fairy knocking tell Her I'm not in"

  7. #6
    1st Gear

    Status
    Offline
    Join Date
    Feb 2007
    Posts
    144
    The funny thing is I got it remapped today and the loose injector prolly helped it make more power as it is helping getting more air in.

  8. #7
    Blue_Thunder's Avatar
    6th Gear

    Status
    Offline
    Join Date
    Feb 2007
    Location
    Liverpool
    Posts
    1,691
    Wouldn't the pressurised air(and fuel) be escaping from the dodgy injector???
    Mo power, mo problems

  9. #8
    1st Gear

    Status
    Offline
    Join Date
    Feb 2007
    Posts
    144
    Nah, just air it seems.

    LOL I will put a thread up with the remap results if ya want

  10. #9
    shineydave's Avatar
    5th Gear

    Status
    Offline
    Join Date
    Jan 2006
    Location
    Bradford, Yorkshire, UK
    Posts
    904
    it'll be sucking in unmetered air to whichever cylinder is fed by the leaking injector. that'll make the mixture lean and burn hotter. sooner or later the hotter flame will have melted a hole all the way through your piston and suddenly the leak will become inconsequential as you'll be more concerned as to why all the oil has been blown out of your engine and it will only run on 3 cylinders.

    sorry but i can't understand the mentality that thinks it's a good thing to get a remap when there's an obvious fault with the car.

    never mind, it'll prolly have gone bang by the weekend so we won't have to worry about it
    Dave

    "If that's the Turbo Fairy knocking tell Her I'm not in"

  11. #10
    Rev-head's Avatar
    6th Gear

    Status
    Offline
    Join Date
    Oct 2004
    Location
    Perthshire
    Posts
    2,954
    Quote Originally Posted by shineydave
    i

    sorry but i can't understand the mentality that thinks it's a good thing to get a remap when there's an obvious fault with the car.

    never mind, it'll prolly have gone bang by the weekend so we won't have to worry about it
    Urq RR
    S2 Coupe...RS2 +
    S2 Avant (slipper wagon spec)
    A4 AVANT TDI

  12. #11
    1st Gear

    Status
    Offline
    Join Date
    Feb 2007
    Posts
    144
    Quote Originally Posted by shineydave
    it'll be sucking in unmetered air to whichever cylinder is fed by the leaking injector. that'll make the mixture lean and burn hotter. sooner or later the hotter flame will have melted a hole all the way through your piston and suddenly the leak will become inconsequential as you'll be more concerned as to why all the oil has been blown out of your engine and it will only run on 3 cylinders.

    sorry but i can't understand the mentality that thinks it's a good thing to get a remap when there's an obvious fault with the car.

    never mind, it'll prolly have gone bang by the weekend so we won't have to worry about it
    It was something I was part way through dealing with and I knew I just needed 1-2 hours to reseat the injector again.
    I did check with the company who advised it would not be a problem as long as I made sure I dealt with it quickly.

    Injector is now reseated, I am just unsure why it came loose or needed doing at all.

    Dave I understand what you are saying but I only left the fault for a day max, I was just comenting that the tuners said the figure I got was higher on that day as a result.

    Edit: I should clarify that this issue is now resolved.
    Last edited by Layerz; 5th November 2007 at 22:39.

  13. #12
    Jimbo.King's Avatar
    1st Gear

    Status
    Offline
    Join Date
    Oct 2006
    Location
    Leeds
    Posts
    173
    Quote Originally Posted by Layerz
    The funny thing is I got it remapped today and the loose injector prolly helped it make more power as it is helping getting more air in.
    I would have said it will be down a little on power due to compression loss, see if they will put it back on the rollers now its sorted to get a propper reading.

    2007 A4 3.0tdi Quattro S-line, Lava Grey Pearl, 229+bhp, 6 speed manual, Cruise control, Auto wipers/lights, Parking sensors all round, RNS-E Sat Nav, Heated Volterra leather, Adaptive Bi-Xenon plus headlights, Bluetooth phone prep/voice control, DRL, i-Pod dock, Coming home lights, A4 B5 front spring seat mod, LED DRL/side light/numberplate lights, Window tints, Cupra R front splitter, Black front grill, 3.5" custom tail pipes, 8.5x19 Calibre Excalibre wheels running 225/40/19, ET30-R ET35-F.

  14. #13
    shineydave's Avatar
    5th Gear

    Status
    Offline
    Join Date
    Jan 2006
    Location
    Bradford, Yorkshire, UK
    Posts
    904
    i don't think you could effectively map a car that was sucking in unmetered air because you have no control over what's happening in that cylinder. a proper map shouldn't just rely on turning up the boost. infact turning up the boost should be the last resort. a decent tuner will optimise the timing advance and the fuel/air ratio whilst watching exhaust gas temps and Lambda readings first. obviously if unmetered air is being burned then this process can't happen so firstly the tune will be less than ideal and secondly it will reduce the life of the engine.

    i'm dissapointed that a tuner has actually told you it'll be fine.
    Dave

    "If that's the Turbo Fairy knocking tell Her I'm not in"

  15. #14
    1st Gear

    Status
    Offline
    Join Date
    Feb 2007
    Posts
    144
    Dave, I need my car for 1500-2000 miles a month so any repairs are carried out hastily as possible as it is part of my income.

    However I completley respect what you guys say as I know that you are all knowledgable and that is why I come here.

  16. #15
    shineydave's Avatar
    5th Gear

    Status
    Offline
    Join Date
    Jan 2006
    Location
    Bradford, Yorkshire, UK
    Posts
    904
    i'm actually impressed that you found the leak, i doubt many people would even realise there was a problem. my big gripe though is the tuner that advised you it'd be ok to map it when there's no way they could give you the service you asked for with such a fault.

    you're not the first to have suffered such service from a tuner and i'm sure you won't be the last. it just highlights one of two things, either their prime motivator is money or they don't have the mechanical skills to provide a complete service.

    at least it's all sorted now
    Dave

    "If that's the Turbo Fairy knocking tell Her I'm not in"

  17. #16
    1st Gear

    Status
    Offline
    Join Date
    Feb 2007
    Posts
    144
    Dave? or anyone else the problem is now back again but a bit worse.

    I now have diesel coming out around the base of the injector(or where it goes into the block) and not sure what the hell is happening. It is only a very small trickle but enough to effect ecconomy.

    Previously I just reseated the injector (and this seemed to be ok) and I will take one serious look on saturday when I got some light! I got a feeling it could be the washer was well and truley knackered, does anyone else have any other ideas thou?

  18. #17
    Jimbo.King's Avatar
    1st Gear

    Status
    Offline
    Join Date
    Oct 2006
    Location
    Leeds
    Posts
    173
    Just replace the o ring seal, you said its only 6 months old but they could have caught / nicked the seal putting the injector into the head at factory,
    If you take it to the dealers to get done under warranty the may re-flash the ecu at the same time and then you would lose the remap.

    2007 A4 3.0tdi Quattro S-line, Lava Grey Pearl, 229+bhp, 6 speed manual, Cruise control, Auto wipers/lights, Parking sensors all round, RNS-E Sat Nav, Heated Volterra leather, Adaptive Bi-Xenon plus headlights, Bluetooth phone prep/voice control, DRL, i-Pod dock, Coming home lights, A4 B5 front spring seat mod, LED DRL/side light/numberplate lights, Window tints, Cupra R front splitter, Black front grill, 3.5" custom tail pipes, 8.5x19 Calibre Excalibre wheels running 225/40/19, ET30-R ET35-F.

  19. #18
    1st Gear

    Status
    Offline
    Join Date
    Feb 2007
    Posts
    144
    Nah I fitted the uprated injectors myself and the new oring was from audi.

    I will recheck the entire injector this weekend and replace the seal, not sure why it has gone tbh being new.

  20. #19
    shineydave's Avatar
    5th Gear

    Status
    Offline
    Join Date
    Jan 2006
    Location
    Bradford, Yorkshire, UK
    Posts
    904
    it's strange that it's gone again after 6 months. the mounting hasn't got bent has it allowing that injector to move around?
    Dave

    "If that's the Turbo Fairy knocking tell Her I'm not in"

  21. #20
    macattax's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    Oct 2006
    Location
    Ireland
    Posts
    451
    Get yourself to a garage asap!

    FACELIFT 99.5

    Current Mods: RNS-E MMI Conversion,Carbonio CAI,
    Baileys DV30 valve, Tinted windows, Xenon H.I.Ds, Bosch Aerotwins.


    Planned mods: Rieger Kit,Engine Tuning, Leather sports seats.
    Accomodation when the missus kicks me out for wasting money on a car.

  22. #21
    1st Gear

    Status
    Offline
    Join Date
    Feb 2007
    Posts
    144
    Guys, ignore anything on this now, the engine died today with head gasket failure which I am gutted at.

    I duno but I honestly had the feeling that something was not spot on the car for a while. Not sure if that was part of this problem and an early warning sign but went on the way to work.
    But there was never any real sign or this happening but the past week or two it has been kinda obvious something was up a bit then today the temp light came on and temp went sky high.

    I am not happy, but meh I enjoyed the car whilst it ran, I am now going to get the head skimmed and I am looking at something newer for around 8k.

    On that note I need a receomendation for a car with good performance for 8k, so any suggestions?

  23. #22
    macattax's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    Oct 2006
    Location
    Ireland
    Posts
    451
    Lol you posted that question in here so expect the obvious an S4 or another B5 lol!
    This time dont ignore the early warning signs and take ppls advice when they give it!

    FACELIFT 99.5

    Current Mods: RNS-E MMI Conversion,Carbonio CAI,
    Baileys DV30 valve, Tinted windows, Xenon H.I.Ds, Bosch Aerotwins.


    Planned mods: Rieger Kit,Engine Tuning, Leather sports seats.
    Accomodation when the missus kicks me out for wasting money on a car.

  24. #23
    1st Gear

    Status
    Offline
    Join Date
    Feb 2007
    Posts
    144
    I did take peoples advise matt and sorted the oring issue but it came back again, the slow water leak has been on the car for a long time.
    But it has always been slow and my major issue has been that I have no holiday left due to a massive one a few months ago. I was hoping to sort the issues in jan as it was a suspected bung or valve.
    I agree thou I should of found someway to get the car into a garage sooner then now to get it sorted. And on everything else on the car maintenance has always been carried out imediatley.........trust it to be the one thing you take the risk on.

    I have decided I am going to keep her now, I was apauled by what was on offer for 8k in dealerships even looking around used car showrooms. (however I did test drive a mental megane r26)
    I need to sort something for a few weeks or less whilst mine is brought back to life, I am gona get the head skimmed and nes bits done, but also a few other bits whilst they get it cracked open.

    Reason for not getting a new car is that 8k goes better towards a new house.

 

 

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Single Sign On provided by vBSSO

Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

Content Relevant URLs by vBSEO