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S3 slow to start in the morning

Discussion in 'A3/S3 Forum (8L Chassis)' started by beanoir, Sep 2, 2011.

  1. beanoir
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    beanoir Sharpest Tongue in the West

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    [Sep 2, 2011]
    Hi guys,

    I've noticed my car seems to be a slow to start when the engine is cold (i.e. left overnight). It takes a few cranks before it fires up, probably key held for 2-3 seconds.

    Is this normal or should it be starting pretty much on the key?

    My battery is fine and still pretty new. I know the cars are renowned for sounding like a barrel of bolts when cold, but I didn't expect it to be a laboured start.

    Cheers

    Nick
    #1
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  3. warren_S5
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    warren_S5 Moderator Staff Member Moderator VCDS Map User

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    [Sep 2, 2011]
    Fuel starvation (clogged fuel filter)?

    Slight air leak?

    Can't remember either of my BAM's being slow to start even with 50k on the first one.

    When did you last change the plugs?
    #2
  4. superkarl
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    superkarl MAN OF STEEL

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    [Sep 2, 2011]
    Mine is very much the same. I have to let fuel pump buzz and prime itself for one second then turnover, I just suspect its a tired fuel pump. Doesnt bother me too much, just one second before I turn the key fully.
    #3
  5. beanoir
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    beanoir Sharpest Tongue in the West

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    [Sep 2, 2011]
    I haven't checked the fuel filter actually, are they easy enough to change on these cars?

    Plugs were changed last year at the major service according to the paperwork, so they should be alright.
    #4
  6. beanoir
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    beanoir Sharpest Tongue in the West

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    [Sep 2, 2011]
    I'll give that a go!
    #5
  7. warren_S5
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    warren_S5 Moderator Staff Member Moderator VCDS Map User

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    [Sep 2, 2011]
    the main one which is in front of the tank is a nightmare to get off as the rubber hoses are held on by those PITA hose clips that you need some practice at unclipping! There's a knack to opening them but I can't remember what it is!

    Fair bit of petrol spillage so ensure you have a bowl to hand, but some who have changed have found car had more urgency once this was done.

    Don't know what the reliability of FPR's are like on these, don't think it's an expensive part so may be worth a check too.
    #6
  8. beanoir
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    beanoir Sharpest Tongue in the West

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    [Sep 2, 2011]
    I might give the car a bit of a fuel system service then, may even get one of these ultrasonic baths and do the injectors, i'm guessing that won't hurt either.
    #7
  9. warren_S5
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    warren_S5 Moderator Staff Member Moderator VCDS Map User

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    [Sep 2, 2011]
    They're really good actually, you'd be amazed how much **** comes out of the injectors. If you can get some new rubber seals for the injectors at the same time it's worth doing.

    Just give everything some time to dry out, and remember when you put it all back together it will take quite a bit of time to restart it!
    Last edited: Sep 2, 2011
    #8
  10. s3dave
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    s3dave TFSI Hybrid Supporter

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    [Sep 2, 2011]
    My car has done this since i bought it, second go every time, changed cleaned all of the above, got used to it now..just if left overnight, its fine after that
    #9
  11. beanoir
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    beanoir Sharpest Tongue in the West

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    [Sep 2, 2011]

    Don't tell me that!!! :sadlike:
    #10
  12. warren_S5
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    warren_S5 Moderator Staff Member Moderator VCDS Map User

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    [Sep 2, 2011]
    On cold start mine used to be shaky with S2 but once it got into normal operating temperatures it would idle normally. Missus always said it was like it was shuddering. Don't know if it is just the increased fuelling causing it. But it would start on the nail every time.

    If money is no object and you haven't got anything better to spend your cash on then it's good preventative maintenance, but neither of my cars did it, so whether it's just part of the aging process???? Obviously best to spend as little as possible on doing whatever you do, I don't think fuel filters are expensive, neither are injector seals, and you can get sonic cleaners for <£20 which are useful for all sorts (use them for cleaning G-Shock watch after diving / missus jewellery etc.).
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  13. Rosso TT
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    Rosso TT Member

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    [Sep 2, 2011]
    I had the same problem, in my case the fuel pump was tired on priming the fuel pressure wouldn't oder 20 psi, now with a new fuel pump i get at least 40 psi.
    Now the car starts first time every time.
    I suggest try first spark plug, fuel filter, TB cleaning and reset, then you can try a new fuel pump as last resort cause they're expencive.
    #12
  14. finesse
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    finesse Active Member VCDS Map User

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    [Sep 2, 2011]
    Nick, I am in Southminster I could give it a scan for you
    #13
  15. jojo
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    jojo Looking for Boost! Staff Member Moderator

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    [Sep 2, 2011]
    Mine starts fine after being parked up for 11 months or so, ok, I couldn't get it started at first, but once I got it working, it fires easily first thing in the morning.
    #14
  16. colicabcadam
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    colicabcadam Guest

    [Sep 2, 2011]
    are you sure you guys are driving audis and not some copied chinese variant lol

    my s3 starts first time first crank in any weather condition !
    #15
  17. beanoir
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    beanoir Sharpest Tongue in the West

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    [Sep 3, 2011]
    You know what I might actually take you up on that offer, very kind. I'm in SWF so not far.

    I don't know anything about VCDS/VAGCom so i'd appreciate it if we can hook up and do that. Probably a good idea in case there's anything else that pops up.
    Last edited: Sep 3, 2011
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  18. beanoir
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    beanoir Sharpest Tongue in the West

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    [Sep 3, 2011]
    Show off!! ;)
    #17
  19. damo.h
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    damo.h DVLA Say it's Black

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    [Sep 3, 2011]
    Funny mines done this since we had the cold spell, similar time I had the free coilpacks swap (could this have anything to do with it?? Got used to it now so don't even notice really. fires on 2nd/ 3rd turn if left overnight, but once it's been started fires first time every time even if left to stand for a few hrs. I just put it down to the low temp we had over winter. But it still does it :think:
    #18
  20. s3dave
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    s3dave TFSI Hybrid Supporter

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    [Sep 3, 2011]
    There is an advantage of it not firing first crank, in that oil gets thrown up first....So we are onto a winner damo...:beerchug:
    #19
  21. voorhees
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    voorhees Moderator Staff Member Moderator

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    [Sep 3, 2011]
    #20
  22. jojo
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    jojo Looking for Boost! Staff Member Moderator

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    [Sep 3, 2011]
    Last edited by a moderator: Aug 15, 2014
    #21
  23. 16Klappe
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    16Klappe RacecaR forward is RacecaR backwards. Supporter

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    [Sep 3, 2011]
    I'll give you a race Jojo? :friends:

    Fancy selling me your wheels, or failing that PM'ing me a couple of pictures of them?
    Last edited by a moderator: Aug 15, 2014
    #22
  24. voorhees
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    voorhees Moderator Staff Member Moderator

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    [Sep 3, 2011]
    Yes Mr Jojo Vettel give Jardo a race (maybe he will switch his remap off as well )
    #23
  25. 16Klappe
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    16Klappe RacecaR forward is RacecaR backwards. Supporter

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    [Sep 3, 2011]
    Switch the map off? Surely he'll put it in 2wd mode, I hear that makes them lighter?
    #24
  26. finesse
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    finesse Active Member VCDS Map User

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    [Sep 3, 2011]
    Jardo how about racing your "tuned" A3 against a "tuned" S3? You seem yo have a chip on your shoulder about S3s? :)
    #25
  27. 16Klappe
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    16Klappe RacecaR forward is RacecaR backwards. Supporter

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    [Sep 3, 2011]
    I don't mind winding Jojo up because I know I could have him, I'm dubious of winding you up incase you eat me :3sadwalk:

    *goes off to find just how fast your car is* :readit:
    #26
  28. jojo
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    jojo Looking for Boost! Staff Member Moderator

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    [Sep 4, 2011]

    You know, I'd be up for a remapped S3 vs remapped A3 1/4mile challenge, on the condition that yours is not a stripped out road legal track car like Prawn's! I'm curious as to what is faster? I seriously don't mind losing, but I'd definitely give a go! :racer:
    #27
  29. 16Klappe
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    16Klappe RacecaR forward is RacecaR backwards. Supporter

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    [Sep 4, 2011]
    I totally agree, and again I'd be up for losing. It's something which needs to be put to bed once and for all.

    Mine will not be a stripped out track car like Prawns. However, mine is quicker than Prawns on the road NOT stripped out anyway (or it was a few months back when they were last driven together). Prawns car now with the cage and the LSD is totally insane though, for grip and on the track its great. But he's driven it to work a couple of times and by the sounds of things it isn't much harder to drive anymore anyway.

    So, will it be a run what you brung at Shakspeare or Japfest haha? We could always both get liquid gauges and film it?
    Last edited: Sep 4, 2011
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  30. jojo
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    jojo Looking for Boost! Staff Member Moderator

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    [Sep 4, 2011]
    When is that? I need to give my car a good run first, since it's been parked up for a year, I've been using it daily since I got it started, which is unheard of! lol
    #29
  31. 16Klappe
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    16Klappe RacecaR forward is RacecaR backwards. Supporter

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    [Sep 4, 2011]
    Boom - Shakespeare County Raceway £35 for unlimited runs over the weekend. AND the Saab and Volvo owners club will be there, thats an invitation which CANNOT be missed!

    Lets make it a date! And basically if your break out times are close with your actual runs, you get cash prizes! Or if you crash and burn/have a huge engine problem and they deem you worthy you can get a prize for worst luck of the day and things. I went there one year with my dad in my old Ford Pop and we did a crazy 35 second quarter and got £75 which paid for the fuel there and back haha

    I'd use it daily if it looked as good as yours does!
    Last edited: Sep 4, 2011
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  32. jojo
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    jojo Looking for Boost! Staff Member Moderator

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    [Sep 4, 2011]
    Don't you just love on tangent threads? :laugh:

    This is just down the road from me! A week before Audi drivers aye? hmm.... would be bad to blow my car up a week before the main event! lol I will have to let you know nearer the time, it should be ok though. :)
    #31
  33. finesse
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    finesse Active Member VCDS Map User

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    [Sep 4, 2011]
    Sounds like Jardo has chickened out??
    #32
  34. 16Klappe
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    16Klappe RacecaR forward is RacecaR backwards. Supporter

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    [Sep 4, 2011]
    I'm not chickening out at all, what sort of power is your S3? What times you lapping the ring at?
    #33
  35. finesse
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    finesse Active Member VCDS Map User

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    [Sep 4, 2011]
    oh btw Nick, sent you a PM
    #34
  36. colicabcadam
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    colicabcadam Guest

    [Sep 4, 2011]
    i tell you what you keyboard warriors lol - lets go for a 1/2 mile race, i bet you i can go 1/2 mile AND come back quicker than you can do 1/2 mile lol
    #35
  37. 16Klappe
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    16Klappe RacecaR forward is RacecaR backwards. Supporter

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    [Sep 4, 2011]
    Somebody with a bike said that to this geeza :superman:

    Last edited by a moderator: Aug 15, 2014
    #36
    Powelly and Inertiauk like this.
  38. colicabcadam
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    colicabcadam Guest

  39. rhubarb4
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    rhubarb4 Certified Jardo Slayer

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    [Sep 4, 2011]
    lol the bike just couldnt put the power down
    #38
  40. beanoir
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    beanoir Sharpest Tongue in the West

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    [Sep 5, 2011]
    Right well i've figured out 2 things this week, firstly if I switch the ignition on and let the pump prime before then turning it over, it then starts fine which made me think perhaps the pump was being a bit slow. I've also just had the car hooked up to VCDS, which showed that I have a faulty temp sender, so i'll pick one up and get that sorted. A big thanks to John (finesse) for spending his time and offering to hook the car up to his VCDS, very helpful guy and even did my "bleep on lock" and anti-hijack mods too, really appreciate that!

    I've also picked up one of these ultrasonic cleaners (£25 in Maplins at the moment on offer) so will give my injectors a clean too in the next week.

    Not sure how much it costs or how much bother it is to change the fuel pump, anybody done one before?
    #39
  41. finesse
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    finesse Active Member VCDS Map User

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    [Sep 5, 2011]
    According to jojo that sound is not the fuel pump but the haldex?

    The culprit:
    16502/P0118/000280 - Engine Coolant Temperature Sensor (G62): Signal too High

    Possible Symptoms


    • Difficulties with starting a cold engine.
    • Starting the engine when engine is warmish or warm, idle rpm immediately is 1200 - 3000 rpm.
    • RPM at idle is irregular.
    • With all engine temperatures idle rpm will often vary between 900 - 1000 rpm.
    • With engine warm (90 °C) the engine temperature suddenly drops (70 °C) and slowly comes back to 90 °C.
    • Bad acceleration during warm-up.
    • Diesel Engines: Glow plug indicator may be on for a longer than normal time or at ambient temperatures where it shouldn't come on at all.
    Possible Causes


    • The electrical signal coming from G62 is too low
    • Wiring and/or connections faulty (short circuit?)
    • Engine Coolant Temperature Sensor (G62) faulty
    Possible Solutions


    • Check wiring and connections
    • Check / Replace Engine Coolant Temperature Sensor (G62)


    Part number

    06A 919 501 A
    Last edited: Sep 5, 2011
    #40

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