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Thread: mk3 cat

  
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    nickblackburn82's Avatar
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    mk3 cat

    how do i tell if its gone its a 1.4 8v

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    GB's Avatar
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    if its like my 1.6 8v then every so often u get the unmistakeable stench of rotten egg.

    You may also feel the car losing power - may feel similar to misfiring....with a bit of exhaust blow (for instance mine blows or at least sounds rough at anything above 3000rpm)

    What makes u think its gone?

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    feels loss of power and sounds lumpy on tickover already changed all sensors plugs dizzy cap and rotor arm and leads no smell though also intermittent rattle coming from exhaust i think

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    Put your hand over the tailpipe when the engine is running and see how much pressure your hand is holding in, when my cat went on my mk3 I felt virtually nothing it was like the engine was running at all!

    I then took the cat pipe off and with a jammy bar removed the cat from within the pipe and refitted it again with the same rusty bolts, it passed the mot with no problems and the car ran ten times better!
    Irmscher MK3 Astra Irmscher Mk4 SXi 1.8 16V Vectra C CDTi Astra H 1.7 CDTi XP Moonland SRi CDTi Sporthatch Astra VXR

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