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Cat Block

Discussion in 'General Technical / How To' started by MisterD, Sep 8, 2003.

  1. MisterD
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    MisterD Member

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    [Sep 8, 2003]
    Anyone had experience of a blocked cat?

    What are the symptoms?
    #1
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  3. mramage
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    mramage Member

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    [Sep 9, 2003]
    [ QUOTE ]
    MisterD said:
    Anyone had experience of a blocked cat?


    [/ QUOTE ]

    Yes, one of ours ate too much grass once, got quite blocked up.

    [ QUOTE ]
    MisterD said:
    What are the symptoms?

    [/ QUOTE ]

    Usually they're sick all over the place. Best take the cat to the vet.


    Oh, you were talking about cars! /ubbthreads/images/graemlins/lol.gif /ubbthreads/images/graemlins/angel.gif /ubbthreads/images/graemlins/beerchug.gif

    #2
  4. excursion
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    excursion Member

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    [Sep 23, 2003]
    I had one. Symptoms included headaches and hallucinations whilst driving, and very poor performance and fuel economy.
    #3
  5. AndyC
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    AndyC Moderator Staff Member Moderator

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    [Oct 4, 2003]
    lack of boost pressure
    very poor performance
    slow reving engine
    fuel economy poor also....

    why do you think you have this??
    #4
  6. MisterD
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    MisterD Member

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    [Oct 13, 2003]
    I'm still trying to work out why my engine is unwilling at low revs. Also the turbo and cat get hot really quickly, although this could be normal???
    #5
  7. mramage
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    mramage Member

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    [Oct 13, 2003]

    The 1.8T does warm up pretty quickly compared to other engines I've experienced, so that's probably normal.

    Have you had it tested on VAG-COM? Anyone local to you who can give it a try? Or compared with someone who has a similar car if possible?

    Don't know much about it, but I'd have thought something being blocked would have resulted in it being worse at higher revs? /ubbthreads/images/graemlins/crazy.gif
    #6
  8. alphabet32
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    alphabet32 New Member

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    [Oct 16, 2003]
    Don't know your model details but early A6's 97-99 did suffer from cat. converter failures causing blockages which resulted in lack of power. Also many have & are still suffering from fauly air mass sensors which gives poor acceleration & general lack of power.
    #7
  9. AndyC
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    AndyC Moderator Staff Member Moderator

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    [Oct 20, 2003]
    any other reasons apart from MAF and cat that cause lack of power...

    if there is NO cat (hmmm mr. MOT) and new MAF what else....

    coolant temp sensor?
    timing pick up?
    blocked zorst?
    air leak on intake side??

    #8
  10. Gambba
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    Gambba Active Member

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    [Oct 20, 2003]
    [ QUOTE ]
    AndyC said:
    any other reasons apart from MAF and cat that cause lack of power...

    if there is NO cat (hmmm mr. MOT) and new MAF what else....

    coolant temp sensor?
    timing pick up?
    blocked zorst?
    air leak on intake side??



    [/ QUOTE ]

    Coolant temp sensor would be my favourite.
    #9

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