EM TuningAH Fabrications
Results 1 to 25 of 25
  1. #1
    Voodoo's Avatar
    Neutral

    Status
    Offline
    Join Date
    Jun 2007
    Location
    Telford
    Posts
    48

    Can you Spot whats missing?

    Can the other Audi A3 1.8T prefacelift owners please have a ganders at their engine bay and let me know whats missing?

    My Car has been suffering the missfire issue, however coilpacks and sparks seem fine, took it to a garage for service, and the guy noticed a big hole in the side of the airbox, he reckons something was supposed to be there, and hence has gaffer taped it up.

    Im thinking if there was something there, then perhaps ive been drawing dirty air past the MAF and now the potential faulty MAF is causing the missfire?

    Heres a pic of mine
    Audi A3 1.8T Sport 1999 | 18" RS4 Alloys

  2. # ADS
    ADS
    Join Date
    Always
    Location
    Global
    Posts
    Many
     
  3. #2
    Clach's Avatar
    A3 - 1.8Ts

    Status
    Offline
    Join Date
    Jul 2007
    Location
    Oxford
    Posts
    974
    Injector amp. mate...about 120 from audi or 70 from GSF..where the hell did it go...?
    Turbo Sport, Auto (I know!), A lot of 's -and rising [latest add: Recon'd. tranny] sunk in her since Aug. 07...

  4. #3
    Voodoo's Avatar
    Neutral

    Status
    Offline
    Join Date
    Jun 2007
    Location
    Telford
    Posts
    48
    Dont think its ever been there, cant say ive ever noticed anything in that area... whats one of those look like
    from the sounds of it that would explain the intermittent missfire issue then
    Audi A3 1.8T Sport 1999 | 18" RS4 Alloys

  5. #4
    Clach's Avatar
    A3 - 1.8Ts

    Status
    Offline
    Join Date
    Jul 2007
    Location
    Oxford
    Posts
    974
    I am surpised it has ever worked properly without it...if no-one comes up with a pic I will do it tomorow for you....l
    Turbo Sport, Auto (I know!), A lot of 's -and rising [latest add: Recon'd. tranny] sunk in her since Aug. 07...

  6. #5
    Voodoo's Avatar
    Neutral

    Status
    Offline
    Join Date
    Jun 2007
    Location
    Telford
    Posts
    48
    its definately been fine for at least a year, this is only a recent problem thats cropped up. Bit of a bugger really as im looking to sell the car in december due to new job and company car etc... looking to get it all fixed.
    Will it be causing any damage by driving without it or just slow performance?

    cheers for the help
    Audi A3 1.8T Sport 1999 | 18" RS4 Alloys

  7. #6
    Clach's Avatar
    A3 - 1.8Ts

    Status
    Offline
    Join Date
    Jul 2007
    Location
    Oxford
    Posts
    974
    2 secs mate, i will pop outside and take a pic...
    Turbo Sport, Auto (I know!), A lot of 's -and rising [latest add: Recon'd. tranny] sunk in her since Aug. 07...

  8. #7
    Clach's Avatar
    A3 - 1.8Ts

    Status
    Offline
    Join Date
    Jul 2007
    Location
    Oxford
    Posts
    974
    sorry bud, will be with you soon...
    Turbo Sport, Auto (I know!), A lot of 's -and rising [latest add: Recon'd. tranny] sunk in her since Aug. 07...

  9. #8
    Clach's Avatar
    A3 - 1.8Ts

    Status
    Offline
    Join Date
    Jul 2007
    Location
    Oxford
    Posts
    974
    http://i114.photobucket.com/albums/n...onRally012.jpg

    Ok, the inj. amp (which has plenty of other names) was replaced by the progressive coilpacks in late 2000 models, which caused so much trouble..I am stunned that your car works without it....
    Turbo Sport, Auto (I know!), A lot of 's -and rising [latest add: Recon'd. tranny] sunk in her since Aug. 07...

  10. #9
    Voodoo's Avatar
    Neutral

    Status
    Offline
    Join Date
    Jun 2007
    Location
    Telford
    Posts
    48
    ahh hah, yes that would certainly fit nicely in that hole... FFS where the hell has that gone, theres no cables hanging about... its either never been there since I bought it or some muppet at the garage has forgotten about it then. grr

    ill have a good root round for hanging cables tomorrow, but I doubt theres anything... the guy in the garage has already had a good look around anyway

    thanks for your help.. ill look to get it replaced ASAP
    Audi A3 1.8T Sport 1999 | 18" RS4 Alloys

  11. #10
    Clach's Avatar
    A3 - 1.8Ts

    Status
    Offline
    Join Date
    Jul 2007
    Location
    Oxford
    Posts
    974
    http://audi-sport.net/vb/showthread.php?t=49762

    This is the trouble I had when mine went...the only explanation I can think of [but unlikely] is that your car has been upgraded in some way??? new style coilpacks have the Inj. amp function incorporated into them, which caused big problems as they constantly failed. Pre-facelift had screw in hitachi ones which seem to work better...

    Good luck mate
    Turbo Sport, Auto (I know!), A lot of 's -and rising [latest add: Recon'd. tranny] sunk in her since Aug. 07...

  12. #11
    Audi OCD

    Status
    Offline
    Join Date
    Sep 2008
    Posts
    68
    When I bought my A3 it had an induction kit on so the injector amp was fixed to a bracket. Then I decided to put an original airbox on, and the only one I found was from a scrapped golf (1.8 T). When I got the airbox home I noticed the shape of the injector amp stamped onto the side of it, I realised this must be where my injector amp is mounted so cut the hole out to fit it in. I concluded that some cars have the injector amp mounted in the air box and some don't, but they use the same airbox for all cars and cut out pieces where necessary to suit different engines.

    Maybe your original airbox got damaged or lost somehow and was replaced with a different one? Or like Clatch says it has been upgraded. If your injector amp is supposed to be there - there should be 2 cables coming out from the black trunking.

  13. #12
    Clach's Avatar
    A3 - 1.8Ts

    Status
    Offline
    Join Date
    Jul 2007
    Location
    Oxford
    Posts
    974
    possibly as lucksta stated, your amp is elsewhere....mmm. see what you find now you know what to look for and let us know...
    Turbo Sport, Auto (I know!), A lot of 's -and rising [latest add: Recon'd. tranny] sunk in her since Aug. 07...

  14. #13
    Prawn's Avatar
    My other car is a MINI!!!!

    Status
    Offline
    Join Date
    Dec 2006
    Location
    Basingstoke
    Posts
    9,389
    in the top left of your picture I can see a throttle cable, which would imply that the engine is an AGU.

    If it's an AGU then it will have a seperate ignition amplifier. (it's an ignition amp btw guys)

    The AGU coilpacks do not have individual amps built in, so a single one is used for all coil packs.

    As a result, it gets quite hot, hence the need for an alloy heatsink on the back, which is fitted in the flow of the inlet air to keep it cool.

    Somewhere your engine WILL have that igntion amp. It's often removed when fitting nasty induction kits and mounted somewhere else. It can't have gone far though, as there isn't too much length on the wiring!
    -------------------------------------------------------------------------------------------------

    Prawns TFSI Turbo'd 1.8T Track Car

    But I know nothing so ignore me.

  15. #14
    Clach's Avatar
    A3 - 1.8Ts

    Status
    Offline
    Join Date
    Jul 2007
    Location
    Oxford
    Posts
    974
    i stand corrected, cheers prawn, an ign. amp...but either way good luck
    Turbo Sport, Auto (I know!), A lot of 's -and rising [latest add: Recon'd. tranny] sunk in her since Aug. 07...

  16. #15
    Voodoo's Avatar
    Neutral

    Status
    Offline
    Join Date
    Jun 2007
    Location
    Telford
    Posts
    48
    Yes it is an AGU with old style coilpacks in, is this little box the thing that sends the signal from the ECU to the coilparks to in turn get the sparks firing?

    came accross this in my research before was considering testing it at some point for the missfire?
    http://forums.audiworld.com/a4/msgs/1594531.phtml

    so its possible this little box is sitting somewhere else but belongs in the airbox if its got a hole cut out?
    job for tomorrow me thinks
    Audi A3 1.8T Sport 1999 | 18" RS4 Alloys

  17. #16
    abdus's Avatar
    Top Gear
    Cell-Out Champion

    Status
    Offline
    Join Date
    Apr 2007
    Location
    On an Island
    Posts
    1,810
    yes, it might be that they mounted it to some other part of the engine bay. as Prawn stated. Not a big job to put back in place once you find it.

    BTW regarding the above link about testing it, i've tried it and my module was dead on cylinder 3.
    ^^ In my opinion


  18. #17
    fingermouse's Avatar
    thats me

    Status
    Offline
    Join Date
    Sep 2004
    Location
    west yorkshire
    Posts
    3,762



    oh and smile

    red to red black to black blue to bits

  19. #18
    Clach's Avatar
    A3 - 1.8Ts

    Status
    Offline
    Join Date
    Jul 2007
    Location
    Oxford
    Posts
    974
    lol, excellent ....my classic good looks!
    Turbo Sport, Auto (I know!), A lot of 's -and rising [latest add: Recon'd. tranny] sunk in her since Aug. 07...

  20. #19
    Voodoo's Avatar
    Neutral

    Status
    Offline
    Join Date
    Jun 2007
    Location
    Telford
    Posts
    48
    Righty ho, had a look around today and followed the wiring loom down... hey presto there it is hanging at the bottom of the loom.... was bit fidely to put back into the airbox with that damn rubber seal, but its all back together and matches the lovely pics above now.

    Thanks for all the help with that one... I need to run it about a bit to see if its still missfiring but could it be the MAF at fault now? as ive no doubt had a big hole in the airbox above the filter for a while now, could I have knackered the MAF and hence missfire? I doubt the fact the injector amp not being in place would cause the fault, unless there was a dodgy connection whilst it was haning down, im hoping it was as simple as that though.

    Testing required now me thinks
    Audi A3 1.8T Sport 1999 | 18" RS4 Alloys

  21. #20
    Prawn's Avatar
    My other car is a MINI!!!!

    Status
    Offline
    Join Date
    Dec 2006
    Location
    Basingstoke
    Posts
    9,389
    it is possible that the injector amp has gotten too hot and fried itself, causing it to misfire..... I know that often when people fit an induction kit and just leave the amp hanging, it can overheat and fry the insides.....

    when I had a chavvy induction kit, I strapped the ign amp with the heatsink against the cold metal pipe of my CAI to keep temps down, and it never got hot!
    -------------------------------------------------------------------------------------------------

    Prawns TFSI Turbo'd 1.8T Track Car

    But I know nothing so ignore me.

  22. #21
    HTC
    HTC's Avatar
    6th Gear

    Status
    Offline
    Join Date
    Jan 2004
    Location
    Koh Samui, Thailand
    Posts
    3,402
    What injector amp?? Injectors fired directly from the ECU.

  23. #22
    Voodoo's Avatar
    Neutral

    Status
    Offline
    Join Date
    Jun 2007
    Location
    Telford
    Posts
    48
    Car has been driving perfectly since putting the injector amp back where it belongs... been fine yesterday and today, driven about 50miles with it now... so looks like an intermittent connection on that was causing the issues.

    Thanks again for all the help
    Audi A3 1.8T Sport 1999 | 18" RS4 Alloys

  24. #23
    HTC
    HTC's Avatar
    6th Gear

    Status
    Offline
    Join Date
    Jan 2004
    Location
    Koh Samui, Thailand
    Posts
    3,402
    IGNITION AMP!!!! :-)

  25. #24
    Voodoo's Avatar
    Neutral

    Status
    Offline
    Join Date
    Jun 2007
    Location
    Telford
    Posts
    48
    whatever

    ill just call it the stupid little overpriced box that broke my audi
    Audi A3 1.8T Sport 1999 | 18" RS4 Alloys

  26. #25
    HTC
    HTC's Avatar
    6th Gear

    Status
    Offline
    Join Date
    Jan 2004
    Location
    Koh Samui, Thailand
    Posts
    3,402
    Could be worse, you could have 4 of them going wrong like on later engines.

 

 

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