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Bad Morning

Discussion in 'A3/S3 Forum (8L Chassis)' started by big_mo, Oct 21, 2010.

  1. big_mo
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    big_mo MOSES

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    [Oct 21, 2010]
    Had bad start to the day. I de iced the car for work set off and 5 miles down the road just about to over take a car and it goes tits up. The noise what came from my car was nasty sounded like a scooby.
    I turned around got her back home pluged it to a little diagnostics tester i have. And came up with codes 16684 & 16686.

    Has any one had these and could tell me if its ether a plug or coil pack please
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  3. CHRIS555
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    CHRIS555 DOPE with added OCD

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    [Oct 21, 2010]
    **** sorry to hear that, hopefully someone will have the fault code info for you
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  4. Welly
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    Welly VX220 SC Driver :)

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    [Oct 21, 2010]
    #3
  5. <tuffty/>
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    <tuffty/> Badger 5 Edition Staff Member Moderator

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    [Oct 21, 2010]
    16684/P0300/000768 - Ross-Tech Wiki

    16686/P0302/000770 - Ross-Tech Wiki

    I have had this on cold mornings before... if the car runs fine after cycling the ignition then it should all be fine... if the engine still sounds like a scooby then you have a coil pack down...

    Check the plug gaps while you are at it as anything larger than 0.7mm on mapped 20v engines tends to shorten the life of coil packs...

    <tuffty/>
    #4
  6. <tuffty/>
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    <tuffty/> Badger 5 Edition Staff Member Moderator

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    [Oct 21, 2010]
    Snap...

    <tuffty/>
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  7. Welly
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    Welly VX220 SC Driver :)

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    [Oct 21, 2010]
    LOL. Feeling better today I take it? Much more on the ball.... :thumbsup:
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  8. <tuffty/>
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    <tuffty/> Badger 5 Edition Staff Member Moderator

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    [Oct 21, 2010]
    Actually no mate... rough as you like tbh... late one at Bill's followed by a popped hose up the vatch on the way home and crappy man flu keeping my up all night... :thumbsup:

    Ironically changed 4 coil packs on an S3 that came in for a Revo last night too...

    <tuffty/>
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  9. Welly
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    Welly VX220 SC Driver :)

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    [Oct 21, 2010]
    Couldn't make it last night - missus duties. I've not been in the best books lately.... lol.

    It's the bloody change from nice and warm to freezing cold that kills the coils. It's only going to be a matter of time before I have one pack a sad. Especially now I've removed the under bonnet padding - the bay gets very cold.
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  10. felix_kentish
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    felix_kentish New Member

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    [Oct 21, 2010]
    Not sure if anybody has seen it but there is a free I-phone app called 'cartrouble'. It's mostly **** but it does have a fault code database in it.
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  11. <tuffty/>
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    <tuffty/> Badger 5 Edition Staff Member Moderator

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    [Oct 21, 2010]
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  12. Prawn
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    Prawn My other car is a MINI!!!!

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    [Oct 21, 2010]
    What do you mean by cycling the ignition Paul?

    my AUM does something very strange on cold start, in that I start it up, and it idles just fine at an elevated higher RPM on cold start whilst the SAI is running, but after about 30-40 seconds, it'll missfire strangely for about 10 seconds then stop again and idle fine.

    It only ever does this on cold start, and runs perfectly the rest of the time with no misfires or fault codes.

    is this some sort of ignition cycle testing all the coilpacks? and the short misfire suggesting I've got a dodgy one?
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  13. <tuffty/>
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    <tuffty/> Badger 5 Edition Staff Member Moderator

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    [Oct 21, 2010]
    Just turn the engine off and restart... usually stops the misfire... typically this happens as cold start runs rich and the misfires are flooding related... restarting the engine will clear this normally... if you actually have a coil pack down though this will remain... buggered coil packs are buggered coil packs...

    <tuffty/>
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  14. Welly
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    Welly VX220 SC Driver :)

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    [Oct 21, 2010]
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