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New MAF and still not working!!!!!!!

Discussion in 'A3/S3 Forum (8L Chassis)' started by pacman1.8t, Mar 27, 2010.

  1. pacman1.8t
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    pacman1.8t New Member

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    [Mar 27, 2010]
    Just been to audis and bought a new MAF sensor as the car feels way under powered (like its bein pulled by a twitchy tractor) but its still not running right :faint:. Now im scratching my head thinking what else it could be, telling myself to stop being a tight arse and take it into audi. What to do.........
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  3. S3 Nattie
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    S3 Nattie Quattro ist für sissies

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    [Mar 27, 2010]
    How did you know it was your MAF that was gone in the first place, did you unplug it and see how it drived. Some people say you also need to delete the error code if it is your MAF when you get a new one.

    Have you got VAG COM.
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  4. pacman1.8t
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    pacman1.8t New Member

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    [Mar 27, 2010]
    It was a random stab in the dark which has now cost me lol, i havnt had any codes come up before and still non now. but im now in the process of checking anything and everything i can for leaks, and have come across what seems to be a sensor of some sort just hanging down underneath where the battery sits, maybe a rad sensor of some sort giving the wrong readings to ECU therefore overfeulling??? and no i dont have a vag-com but i gots a very helpfull guy coming over monday to sort me out with that
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  5. S3 Nattie
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    S3 Nattie Quattro ist für sissies

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    [Mar 27, 2010]
    It can be very expensive, trial and error. The MAP sensor is infornt of the battery so could be that, saying that you would likely get EML on. I bought a new MAF few weeks back and it ran the same and I took it straight back and they gave me my old one back. You could make out that MAF is faulty and try get your money back.

    Best thing to do is to check all the boost hoses and hoses underneath the inlet manifold and possibly the intercooler hoses as you havent got VAG COM. Take the negative termial off on the battery for an hour as this will delete any error codes you have that hasnt flagged a light up.
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  6. pacman1.8t
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    pacman1.8t New Member

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    [Mar 27, 2010]
    right, so ive had a look around and found a very brittle hose here is a pic, maybe this was leaking, would this cause power loss??

    [​IMG]
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  7. S3 Nattie
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    S3 Nattie Quattro ist für sissies

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    [Mar 27, 2010]
    There your leak problem. That hoses goes on top of your DV. Get some silicone and change it and power will be back to normal.
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  8. pacman1.8t
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    pacman1.8t New Member

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    [Mar 27, 2010]
    Well thats now been fixed with some silocene tubing and still no good! i wonder if there is a leak somewhere after the turbo, at low revs when the car is parked u can slightly hear it hissing and when you turn the car off it continues to hiss for a second or to....any thoughts?? thanks
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  9. Y83OLK
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    Y83OLK Hulk Smash!

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    [Mar 27, 2010]
    You may have other perished hoses, if that ones gone.
    May help if you give us some symptoms.
    Do you have access to vagcom?
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  10. pacman1.8t
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    pacman1.8t New Member

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    [Mar 27, 2010]
    Basically the car has no power (asif it wasnt turbo'd) and judders when pulling of or trying to boot it. also theres a funny sound the engine makes but i cant work out what, a sort of deep tapping sound...

    I just found this to.....

    [​IMG]

    Although this may answer my boosting problems it doesnt solve the reason why it sounds like its misfiring and juddering,
    #9
  11. S3 Nattie
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    S3 Nattie Quattro ist für sissies

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    [Mar 27, 2010]
    Thats your intercooler pipe and if your getting unmetered air into the sytem you will get judders and misfires. Your air flow into the inlet manifold will be all over the place so get that hosed replaced as soon as possible.

    Have you checked the coil packs as they maybe on there way out. Only thing you can really do is check the hoses for visual damage.
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  12. pacman1.8t
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    pacman1.8t New Member

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    [Mar 27, 2010]
    Im in the middle of takin a few parts off here and there to get at the rest of these pipes, is there any particular way of testing coil packs?
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  13. AudiiduA
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    AudiiduA Member

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    [Mar 27, 2010]
    Hi Pacman, this sounds exactly like mine was when i bought it! mine turned out to be no1 coil pack, but i put in iridium tipped plugs and all new coil pscks to make sure! if you get just one coil pack,(seen em on ebay cheap!second hand) and take one at a time off and replace it, this will determin wich ones going!thats if theres only one??
    mine at idle was slightly lumpy, but try to give it some beans and juddered all over! with all this in mind it maybe just a plug??? if your in the midlands i can give you a number of a VW/Audi specialist thats mobile! good prices too:icon_thumright:
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  14. pacman1.8t
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    pacman1.8t New Member

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    [Mar 27, 2010]
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  15. AudiiduA
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    AudiiduA Member

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    [Mar 27, 2010]
    Yeah they look ok but how do you know there not fooked too??
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  16. pacman1.8t
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    pacman1.8t New Member

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    [Mar 27, 2010]
    Yeah i spose better to buy one thats been tested you think??
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  17. audia3turrbo
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    audia3turrbo Member

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    [Mar 27, 2010]
    Hmmm i think i have that wire hanging just under my batery too,do you no what that wire is for ?
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  18. leshkin
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    leshkin Speeding in reverse gear VCDS Map User

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    [Mar 27, 2010]
    If your coilpacks are on their way out, you will almost always get a misfire error logged. From your earlier comment, you seem to have no errors. Looking at the state of your pipes, I'd say that you should spend money on new pipework rather than new coilpacks.
    #17
  19. audia3turrbo
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    audia3turrbo Member

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    [Mar 27, 2010]
    Any body no what the wireing is under the batery cheers
    #18
  20. pacman1.8t
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    pacman1.8t New Member

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    [Mar 27, 2010]
    A far as the coil packs go il wait till i get it vag-com'd on monday but i gotta order a few pipes to as i have found several faulty split ones.
    I think that wire with the sensor on the end fits in the front of the bumper as theres a little slot or hole it can fit in, in the lower grill???
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  21. AudiiduA
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    AudiiduA Member

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    [Mar 27, 2010]
    Well i would buy new all 4! but to just test second hand buy just one, eeerm? but if all goin down then yeah for 20quid! may as well!:think:
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  22. pacman1.8t
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    pacman1.8t New Member

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    [Mar 28, 2010]
    Ahha! got ya! i found out whats wrong!! after finding several split hoses and leaky joints i found the main culprute was a spark plug!! Just gonna go down to halfords and buy a new set................ fingers crossed................................
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  23. Ptwin
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    Ptwin New Member

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    [Mar 28, 2010]
    The dangling sensor looks like the outside temp sensor,there should be a hole in the front of your bumper which it clips into mate.
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  24. audia3turrbo
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    audia3turrbo Member

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    [Mar 28, 2010]
    Ohhh i will try and find thet whole has been anoying me for like a year lol
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  25. pacman1.8t
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    pacman1.8t New Member

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    [Mar 28, 2010]
    Hmmmm so it wasnt the spark plugs......£30 pounds later! wasnt the coil pack and wasnt the MAF sensor........£80 later............. so just to round it off, iv searched all relating pipes and connections for leaks........ changed MAF sensor........... replaced all the small tubing that goes to the recirculating valve............. new bosch spark plugs, and still scratchin my head. i did however do some unplugging and swapping of the coil packs and have found out that cylinder 4 (the nearest to the airbox) is not fireing whatsoever

    This is a pic with that coil pack disconnect and the car is running exactly how it was before but its not the coil pack cause iv swapped them around 2 or 3 times

    [​IMG]

    Where the bulldog clips are was where a hose was split so i shortend it and put it back together (temporary bodge)

    [​IMG]

    Here we have the fuel rail off to get at the injectors, at this point i thought as that cylinder wasnt working maybe a naff injector

    [​IMG]

    And finally here are all four injectors out, im not sure whether you can make out that there is a crack on the end of the second one down, but that wasnt the injector out of the fourth cylinder so i geuss that this injector still works properly

    [​IMG]

    All now back together, everythings working fine apart from that last cylinder not sparking....dodgy electrics???
    #24
  26. leshkin
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    leshkin Speeding in reverse gear VCDS Map User

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    [Mar 28, 2010]
    Sorry to hear that mate.

    Dodgy ignition cables are not unheard of, so might be them. Could it be a bad connection on the coilpack plug?

    Have you swapped the injectors about to confirm that all of them are working correctly?
    #25
  27. pacman1.8t
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    pacman1.8t New Member

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    [Mar 28, 2010]
    Iv had a look at the connection on the coilpack plug and all seems okay, and yes iv swapped the injectors about and still cylinder 4 is not sparking
    :sadlike:
    #26
  28. Broken Byzan
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    Broken Byzan Photographic Moderator Staff Member Moderator VCDS Map User

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    [Mar 29, 2010]
    Its a preface 1.8T yes?

    It's the ignition amplifier on top of the airbox, they drop one cylinder at a time when they go faulty.
    #27
  29. ALPINE
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    ALPINE Yes its diesel, now cry u lost

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    [Mar 29, 2010]
    thats interesting to know. i get the occasional pop now and again.
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  30. pacman1.8t
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    pacman1.8t New Member

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    [Mar 29, 2010]
    Yes it is, and yeah that is pretty interesting, would a clean suffice or a new one, i got a vag-com being done in a min so hopefully that would pick it up??
    #29

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