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really dodgy idle after fixing my leak

future Jan 3, 2011

  1. future

    future Scuderia Vittoria Edition 001

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    hey, fixed a leak in the breather pipe coming off of the intake manifold to the pcv system today and fitted a catch tank. however now the car has a really rough idle, almost hunting sometimes like its over fueling :banghead: the only thing i can think is that jbs mapped it while the split was there affecting the fuelling and now needs adjusting? if not can someone point me in the right direction please.

    cheers
    tom
     
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  3. Emmo

    Emmo Registered User

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    Have you tried a throttle body reset?
     
  4. future

    future Scuderia Vittoria Edition 001

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    ohh no i havnt, need a copy of vagcom for that dont I? anyone near bournemouth with it? lol

    cheers
    tom
     
  5. Jacko4130

    Jacko4130 Goodie Gum Drops

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    Stage 1 map is generic so cant see that being your problem, have you replaced all the hoses under the inlet manifold?

    I had this problem with mine and found a hole bunch of hoses with holes and splits in, I ended up removing the inlet and doing the lot, forge do a silicone set.
     
  6. future

    future Scuderia Vittoria Edition 001

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    oh and forgot to add, when driving the car clears 2k upwards and drives fine, and now pops & bangs on the overrun.

    tom
     
  7. Emmo

    Emmo Registered User

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    throttle body reset can be done by turning the key in the ignition so dash lights up, last position before engine starts.
    Dont touch the pedals etc, leave it for about a minute, the throttle body will reset itself.
    Turn off ignition and then you can restart.
     
  8. <tuffty/>

    <tuffty/> Badger 5 Edition...Its all about the flow... Staff Member Moderator

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    If you fixed it and its running a little rough its probably due to ECU adaption that was in place to counteract the leak in the first place... you should find (providing you don't have any other leaks) that it will clear after 20mins or so of driving as the ECU re-adapts itself again... I would have thought JBS would have spotted this as looking at block 032 in VCDS (VAGCOM) will give you an idea if there is a problem... standard health check stuff tbh..

    If after a bit of driving about its still idling badly then you have a further leak somewhere... as already said a stage 1 map shouldn't have had any adjustments made specially for your engine...

    <tuffty/>
     
  9. metricspaces

    metricspaces Registered User

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    I think this may be an urban myth, and that the only way to guarantee that a throttle body reallignment is carried out is by using VAG-COM.
     
  10. future

    future Scuderia Vittoria Edition 001

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    thanks for all the help! i will reset the tb home style and go for a drive like tufty said and see where i stand. i re did all the hoses so shouldnt be another one :shrug:

    cheers
    tom
     
  11. gavin89

    gavin89 Wana go Low gotta go Slow

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    Im in Bournemouth and got full VAGCOM, happy to help mate :) Just give me a PM.
     
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  13. future

    future Scuderia Vittoria Edition 001

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    pm'd ;) thanks for your help gav!

    tom
     
  14. gavin89

    gavin89 Wana go Low gotta go Slow

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    Just replied ur PM, dunno if you got a full inbox or not cus its not appearing on my sent mail :huh:
     
  15. Welly

    Welly 335D Driver :-)

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    It does work, if you have the bonnet open whilst doing it, and also review VAG COM during, the TB does adapt. You can also hear it.
     
  16. metricspaces

    metricspaces Registered User

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    I can't find the page right now, but I'm pretty sure I read somewhere on VAG-COMs site that simply turning the key in the ignition won't always guarantee TB adaption (i.e. it may work sometimes, but not others), and that the only way to guarantee the TB adapts is to use VAG-COM.
     
  17. Welly

    Welly 335D Driver :-)

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    Which is all fine and dandy if you have it.... lol. It's never not worked for me, but you may well be right. If you're going to do this, you might as well take it off and give the TB a good clean out as well to be fair.

    I'm considering porting mine...
     
  18. future

    future Scuderia Vittoria Edition 001

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    thats something i hadnt thought of cheers welly :thumbsup: and will try it with the key but gavin89 is only 10 mins down the road from me and hes been nice enough to let me use his vagcom if not.

    cheers
    tom
     
  19. Welly

    Welly 335D Driver :-)

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    If you've got access to VAG COM mate, do it through VAG COM.

    See here: Ross-Tech: VAG-COM: Throttle Body Alignment

    However - looking back over this thread, I would be VERY surprised if that turns out to be the problem.

    What you describe sounds like a vac leak to me, maybe you have unknowingly knocked something somewhere. That's what my money would be on, especially as it drives fine upwards of 2K.

    Whilst you have VAG COM, and BEFORE you reset the fault codes - look at measuring block 032 and record the values. Then post them.

    In the mean time, go over all the small vac hoses with a fine tooth comb to rule them out if nothing else.
     

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