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n249 pipework and crap running issues

Discussion in 'Leon Mk1 (2000-2006)' started by james walker, Feb 9, 2010.

  1. james walker

    james walker cooling is the key people

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    fellas... looking into a strange hissing i have, now when i went from bypass back to oem, i had to fabricate the pipework a bit due to losing the oem stuff.

    the pipe that comes from the dv nipple top.... what size is this, as the metal hard pipe it adjoins to under the dv is a larger diameter...

    and the pipe that comes from the vac reservoir to the other metal hard pipe to the left of the dv one.. diameter on this aswell?

    trying to eliminate weak points in the system for leaks

    help appreciated on this one, i can hear a hissing from around that area, was there before the fmic install so unrelated.

    symptoms i have... in 2nd mainly hesitation on part throttle, high revs in 5th and 6th pull back slightly then go and pull back alittle more.

    vagcom suggests no boost leaks, but is running lean.

    starting to annoy me now, just want it running right

    also seems to be using more fuel than normal|?????
     
    #1 james walker, Feb 9, 2010
    Last edited: Feb 11, 2010
  2. james walker

    james walker cooling is the key people

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    sorry mate should have said... its for the leon cupra not the r.
     
  3. Ronin225

    Ronin225 Active Member

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    Pipe from top of DV is 5mm
    Most could probably be replaced with 4-5mm silicon as it is quite malleable
     
  4. james walker

    james walker cooling is the key people

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    and what is the diameter of the pipe it goes into... its larger than the dv nipple
     
  5. Mylo

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    If you warm up the hose you can get it to fit over the metal pipe, thats what I did I think:)
     
  6. james walker

    james walker cooling is the key people

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    guys anyone got the oem pipework still for the n249, need the oem pipes from the vac reservoir to the metal pipe, and the oem from dv nipple to metal pipe please???

    trying to eliminate my horrible running issue and running lean.

    so far come up with this, split pipe under inlet manifold, which i will look at a.m. other than that im stumped tbh.
     
  7. james walker

    james walker cooling is the key people

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    also, could a dodgy coolant sensor or thermostat cause running issues similar to these, temperature needle is working ok.
     

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