Notices
 

  

User Tag List

Thread: 3.0 quattro starting issues

Page 1 of 16 12311 ... LastLast
Results 1 to 10 of 156
  1. 3.0 quattro starting issues 
    #1
    Join Date
    Feb 2016
    Location
    Cheshire
    Posts
    155
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    13 Post(s)
    Hi all
    Recently bought an Audi A4 B6 convertible 3.0 V6 Quattro.


    All was good until I drove it to my local supermarket the other day. When I come from out the shop the car had trouble starting, but I managed to get it going in the end (think I pressed on the accelerator). Anyway, never really thought any more about it and just saw it as an inconvenience more than anything. A couple of nights ago, I went to the supermarket again, come out about 10 mins later, and again the car wouldn't start. This time the accelerator trick didn't work either. After about 20 mins of trying I decided to call the RAC out. When he turned up he did the usual stuff and pretty much the car started straight away for him (but the ABS and EPS lights stayed on - they also appeared a couple of nights ago, but went out next time the car was switched on).


    He asked a few questions that I found odd at the time of him asking but after asking him why he asked it made sense. He said 'Has the car been standing for some time'? To which I answered yes around 3-4 months. 'When you last had trouble starting it, did you press the accelerator?' Yes, yes I did. He then plugged in his diagnostic machine, and after some connection issues, it finally connected and the ECU threw up faults on pretty much everything, he said some could be down to low voltage, but also could be a problem of condensation in the ECU? He showed me where to look for water (one of the fuse boxes on the O/S of the bonnet just under the wipers, and said he can see moisture in there so it needs to be dried out. He also said it could be an issue of over fuelling, thus flooding the engine as both trips to the supermarket have been straight from home, which is less than a 2 mile trip.


    I went out in it tonight, and taking into consideration what he told me about short journeys, I went the long way round to my destination which was about 4 miles away but ended up doing something like 6 or 7. After an hour or maybe longer of the car been sat there switched off, I got back in it and it wouldn't start. I tried several times, using the accelerator again, and it finally fired up after several attempts. When I arrived home, I pulled into the drive and switched it off, and thought I'd just give it a try to start it back up, and low and behold, it wouldn't start.


    So, has anybody got any ideas and has the RAC guy got it spot on, as he says this can be a common problem for cars that sit around for a while (getting condensation in the ECU)?
     
    0 0 0
     

  2. Re: 3.0 quattro starting issues 
    #2
    Join Date
    Jan 2007
    Location
    scotland
    Posts
    324
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    21 Post(s)
    It won't cost you anything to dry it out so nothing to lose. Other contenders for poor starting are fuel pump relay and coolant sensor and engine speed sensor G28. Also check the connectors to the ECU sometimes they furr up.


    Sent from my iPhone using Tapatalk
     
    0 0 0
     

  3. Re: 3.0 quattro starting issues 
    #3
    Join Date
    Feb 2016
    Location
    Cheshire
    Posts
    155
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    13 Post(s)
    What's the best way to dry it out? Is it the ecu under the cover I mentioned previously, and by unplugging it, nothing will 'mess up' will it?

    Sent from my SM-G935F using Tapatalk
     
    0 0 0
     

  4. Re: 3.0 quattro starting issues 
    #4
    Join Date
    Jan 2007
    Location
    scotland
    Posts
    324
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    21 Post(s)
    Quote Originally Posted by sergeantcookie View Post
    What's the best way to dry it out? Is it the ecu under the cover I mentioned previously, and by unplugging it, nothing will 'mess up' will it?

    Sent from my SM-G935F using Tapatalk
    Rice is good for drawing out moisture, disconnect battery then disconnect the ECU, it won't present any problems.


    Sent from my iPhone using Tapatalk
     
    0 0 0
     

  5. Re: 3.0 quattro starting issues 
    #5
    Join Date
    Feb 2016
    Location
    Cheshire
    Posts
    155
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    13 Post(s)
    I'll look into doing it one evening this week. I suppose I won't know for sure if it was the ecu at fault until it happens again

    Sent from my SM-G935F using Tapatalk
     
    0 0 0
     

  6. Re: 3.0 quattro starting issues 
    #6
    Join Date
    Jan 2007
    Location
    Aberdeen
    Posts
    1,184
    Post Thanks / Like
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    10 Post(s)
    Sounds like the battery could be shot. Any idea how old the battery is? Low battery also tends to throw up error messages.
    Current- S3 Sportback Nav S-tronic, Mythos Black, B & O, Comfort Pack, Lumbar Support, Lunar Silver interior.
    Gone-A6 C7 biturbo saloon, A6 C6 3.0 tdi Quattro saloon, A6 C5 2.8 Q Avant
     
    0 0 0
     

  7. Re: 3.0 quattro starting issues 
    #7
    Join Date
    Feb 2016
    Location
    Cheshire
    Posts
    155
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    13 Post(s)
    Quote Originally Posted by Scott K View Post
    Sounds like the battery could be shot. Any idea how old the battery is? Low battery also tends to throw up error messages.
    Havent got a clue mate. The rqc guy said try the ecu first with moisture but then also mentioned low voltage. So I don't know?

    Sent from my SM-G935F using Tapatalk
     
    0 0 0
     

  8. Re: 3.0 quattro starting issues 
    #8
    Join Date
    Feb 2016
    Location
    Cheshire
    Posts
    155
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    13 Post(s)
    I managed to get the battery out which tbh was not the easiest of tasks. Unfortunately the surrounding area was absolutely swimming in water. I haven't managed to remove the ecu cover yet as I've had to order a wiper arm puller.

    Where are the drain holes, does anybody know? I've removed most of the water but I guess there's a blockage somewhere

    Sent from my SM-G935F using Tapatalk
     
    0 0 0
     

  9. Re: 3.0 quattro starting issues 
    #9
    Join Date
    Oct 2009
    Location
    Ashford Kent s,e England
    Posts
    2,263
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    1 Post(s)
    There are rubber gromets, one below the battery and one below the servo on the other side of the skuttle.
    They fill up with leaves , dust etc and cause a trap for rain water etc.
    Take away the battery and poke about until you find the gromet, I used a straightened out coat hanger to prod through the gromet until the water drains away, then dry with a sponge/cloth w.h.y.Be sure to check for non blocked area regularly.
    Same on the other side ,but it can be awkward getting under the servo.
    Your ECU lives in the well ( no pun intended ) near your battery and if exposed to excessive water ingress, will die giving you all kinds of hassle.
    Regarding overfuelling etc, I dont think so, regarding battery age/condition, as said above, this if in a lower than suitable charge hold ability, will turn your engine over but not necessarily give enough for the starting system to perform to its prime.
    As an example, car stands a while and loses a small amount of charge in the tired battery but just manages to start your engine, while starting the engine you pull a large amount out of the battery, which is already weak.
    Park at super market after not giving the battery enough charge to replace what was used during the initial start.
    Get your grocery package and return to the car and demand max power again to start and there simply is not enough charge stored.
    Sometimes you will fluke it and the car starts without any detection of the battery weakness, another time, no go.

    So as said above clean and dry plenum chamber drains, some people have just shoved the gromets straight through and left the drain holes unobstructed, this process costs nothing but a little time and messing about.
    Contemplate replacing the battery with a fully charged known quantity.
    Have check done on alternator charging circuit.

    Read forum archives search on plenum chamber drain bungs/gromets on b6 a4 it has been covered and you may find simple guide/how to illustrated for your ease.

    Good luck

    Stuart
    A6 2.4 SE (2000)S3 1.8T (2001)80 Coupe 2.3 (1991)
    A3 1.8T sport (1997)A4 3.0 QST (2002)
    80 Coupe 2.6S (1995)A4 Cab 2.4 sport (2002) Another 2.6 '95 coupe in byzanz purple
    '88 type 89 90 saloon kv 5 pot A4 1.8T 2001
     
    1 0 0
     

  10. Re: 3.0 quattro starting issues 
    #10
    Join Date
    Feb 2016
    Location
    Cheshire
    Posts
    155
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quoted
    13 Post(s)
    Wow what a great reply. I have seen one of the large grommets you are on about but didn't dare move it as knowing my luck it would have run straight into the inside of the car. I thought the ecu was in the black box top left corner. When I can remove my wipers I will get to it to have a good look inside and dry anything out that needs it.

    I'm going to get a new battery as I don't know how old the other one is and it looks as though it's seen better days.

    I'll look into the plenum chamber stuff

    Many thanks again

    Sent from my SM-G935F using Tapatalk
     
    0 0 0
     

Page 1 of 16 12311 ... LastLast

Similar Threads

  1. 3TDi starting issues/ dying issues
    By 20vcqdriver in forum Audi A6 - C6 Forum - 2005 - 2010
    Replies: 4
    Last Post: 16-05-2014, 10:01 AM
  2. Please Help Starting issues
    By jcr1977 in forum Leon
    Replies: 0
    Last Post: 19-07-2011, 10:32 PM
  3. 2.5 tdi quattro starting issues
    By Alex Welham in forum Audi A4 - B6 Forum - 2002 - 2005
    Replies: 3
    Last Post: 08-07-2011, 08:18 PM
  4. audi quattro 2.5 tdi a6 avant starting issues
    By rooos in forum A6 - S6 - RS6 - - Archive Topics
    Replies: 1
    Last Post: 21-05-2009, 09:54 PM
  5. Please Help 1.9 TDi (AFN) starting issues
    By Aeikostx in forum Audi A4 - B5 Forum - 1995 - 2002
    Replies: 3
    Last Post: 12-09-2008, 01:02 AM
Bookmarks
Bookmarks
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  




  



Disclaimer: VW Audi Forum is an "independant enthusiast website", administered in line with guidelines supplied by VAG in the UK, and is in no way related to any of the Worldwide Volkswagen,Audi,Seat,Skoda,Bentley,Bugatti,Porsche or Lamborghini group of Companies. For official up to date information on any of there vehicles, please visit the official websites. Any comments made throughout this website, are the views of the respective poster, and in no way represent the views of the VW Audi Forum Administration, or the worldwide Volkswagen & Audi Group of companies.


VW Audi Forum do not vet and are not responsible for any information which is posted in this forum. All content is viewed and used by you at your own risk and we do not warrant the accuracy or reliability of any of the information.


Copyright: Certain "words", "phrases" and "Images" used on this website by the Administration are "Copyright" of Volkswagen GB, Volkswagen AG (Germany), Audi GB, Audi AG (Germany), Volkswagen Motorsport GB, Volkswagen Motorsport AG (Germany), Audi Motorsport AG (Germany), Volkswagen Racing GB, Bentley, Bugatti, Porsche and Lamborghini. No image can be replicated by anyone WITHOUT the relevant Companies written permission.


All trademarks and copyrights remain property of their respective owners.

No part of the VW Audi Forum website or forum may be reproduced without written permission from the site administration


PLEASE NOTE - PERSONAL ABUSE, ABUSE AGAINST THIS OR ANY OTHER WEBSITE OR ANY COMPANY WILL NOT BE TOLERATED. OFFENDERS WILL BE MODERATED OR EVEN BANNED.


This website and forum are best viewed at a minimum resolution of 1024 by 768.



  



- VW AUDI Forum - The #1 Volkswagen (VW) Group Forum - Volkswagen (VW) - Audi - Seat - Skoda - Bentley - Bugatti - Lamborghini - Porsche - VW Audi Forum -


- www.vwaudiforum.co.uk - www.vwaudiforum.co.uk -