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Thread: Removing pre-cat

  
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    MIKE BERTONE's Avatar
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    Removing pre-cat

    I am doing this later in the week when I feel better.

    Are there any issues that can result from removing it?

    Will mpg be affected and also will it actually give any bhp gains on a 2.2?

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    Any ideas?

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    Ffoeg's Avatar
    2170:01:06
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    Mpg isn't affected at all, and on mine neither was the power . Although in-gear acceleration seemed better, maybe that was just butt my dyno being affected by the increased noise.

    one tip - when you drive it after removing it, take it easy for the first 30mile/½hour so the ECU is kept happy, or it can throw up a light on the dash

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    Quote Originally Posted by Ffoeg View Post
    Mpg isn't affected at all, and on mine neither was the power . Although in-gear acceleration seemed better, maybe that was just butt my dyno being affected by the increased noise.

    one tip - when you drive it after removing it, take it easy for the first 30mile/½hour so the ECU is kept happy, or it can throw up a light on the dash
    How friendly will I have to be to it for the first 30 miles? Under 3k revs?

    Also if the light does come on how do I get it off?

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    Yeah under 3k for 30 miles, the light shouldnt come on, mine didnt, but if it does, do you know anyone that can reset it, tech2 etc. Just be careful of the sensors on the downpipe when removing it, just wiggle gently to remove.
    I think mine did show an increase, hope so!!...but it deffo felt more free, easier to rev, and much better pick up.
    .
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    SOLD Slightly tickled 175.9bhp 2.2 SE2 on 19" vxr's..

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    Ok I am getting the pipe fitted tomorrow (finally) if the light does come on how do I get rid of it? As I don't personally know anyone who can get rid of the light.

    I know it is unlikely that the light will come on but knowing my luck it will. Any help would be appreciated!

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    if it comes on, they can sometimes go off on their own once the ECU adjusts (but it will still have logged a fault code), or it may need switching off via Tech2 at a dealers.

    Best option is not to let it come on in the first place by taking it easy as suggested above

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