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Thread: I'v just put my cat back on for its MOT.

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    aboo's Avatar

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    I'v just put my cat back on for its MOT.

    Can't believe how much quieter it has made my car.

    I took the Cat off the car about 3 years ago when I fitted the RPW downpipes & did the de-cat at the same time. A couple of months later I got a cat back system fitted to the car & it has run like that since.

    The members who have seen my car will know its loud. The last 2 Japfest's it came in at 99DB at the sound test.

    The car has passed its MOT the last 3 years with the de-cat on but the rules have changed & the cat has to be on the car. MOT is on Tuesday so wish me luck
    The mighty Leedsnum has gone but the Airtrek mods will soon fill this space


    How To:Contact Committee or Moderators.

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    Humpty's Revenge's Avatar

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    Where did you say you put the exhaust?

    med_funny-cat.jpg

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    Quote Originally Posted by Steve-vr-4ish View Post
    Where did you say you put the exhaust?

    med_funny-cat.jpg
    Pmsl Steve

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    Good luck! It will hamper your performance too, though. I keep wondering about a sports cat....

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    Quote Originally Posted by Nick Mann View Post
    Good luck! It will hamper your performance too, though. I keep wondering about a sports cat....
    Thanks Nick. The de-cat is going straight back on once I get the MOT Gaskets are sitting in the kitchen

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    or get a spare cat and cut and weld it around a decat pipe so first glance = cat in place!!!
    Still here somewhere........

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    There's an Idea Mike

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    or find a friendlier mot station.

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    It was a friendly MOT station Darren but its new law I think.

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    dont the emissions test? making putting a decat in a car pointless

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    Car used to pass its MOT with de-cat cause our cars came up on the system as a no cat car. Phil (phosty) & Peter both use the same garage as me & they were told that they had to put the cat back on there car & why I have done it for this MOT.

    Edit: You only do an emissions test once a year so a de-cat is best fitted for more power the rest of the year

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    Good luck with the test Andy

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    Car failed MOT Couple of little things. Inner CV boot burst, front drop links loose & lambda readings to high.

    Not worried about the first 2 cause they are easy fixes. It's the lambda readings. Don't know what the figures are yet but no idea how I'm going to sort that one.

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    Picked up the car & have got the figures.

    They did 2 Fast idle tests. Max limit is 1.030. My car in the first test was 1.181 & second test was 1.127

    The CO & HC was fine so it looks like the sensor is going?

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    Andy take it out & clean it with brake cleaner, works a treat but make sure you dry it completely first before re-fitting.

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    Quote Originally Posted by Steve-vr-4ish View Post
    Andy take it out & clean it with brake cleaner, works a treat but make sure you dry it completely first before re-fitting.
    I may try that. With it running so rich for a while there is a possibility it has got chocked up.

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    I am due mot again over here next month lets hope i pass again this year with the decat as im too lazy to put the cat back in ha ha
    1998 Legnum VR4 Twin Turbo

    17" Evo VII alloys in black
    Comma 5.1 brake fluid
    Full exhaust system with decat
    Magnecor performance ignition leads
    NGK BKR7EIX plugs
    Blitz Boost controller Low: 0.5 bar High: 0.9 bar
    Turbo timer
    3 pillar pod with Boost, Oil temp & Psi gauges

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    CV inner boot & drop links sorted today. Also trying Steve's suggestion with the break cleaner on the Lambda. Re test tomorrow at 8am & the guy said he will do the emission test straight away. So I'll rag the tits out of the car before I get there. Wish me luck.

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    Failed again on Lambda reading Spraying the Lambda with break cleaner never worked. Managed to get it down too 1.121

    Got a couple of Lambda's off Peter T at lunch time today (Thank you Peter your a star) & spent the afternoon fitting downpipes & new lambda.

    Go's back in tomorrow morning at 8am again. Fingers crossed that its third time lucky If not I'v ran out of ideas except the Innovate MTX-L Wideband Gauge that Jason is doing the GB for.

    There may be another Legnum being broken soon

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    All my hard work yesterday paid off new MOT for another year

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