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Old 19-11-2020, 13:37   #1
jackg
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getting an MOT without a cat

My EVO doesnít have a Cat and has failed itís MOT on emissions. Is there a way around this?
Ta
Jx
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Old 19-11-2020, 13:48   #2
Humps85
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Put a cat on it. Or dodgy mot.
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Old 19-11-2020, 13:50   #3
jackg
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Mine is a 6 . I had a Cat off an 8 which is longer but we bodged it on and it still failed!
PM if anyone knows a dodgy one!
Jx
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Old 19-11-2020, 17:45   #4
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Originally Posted by jackg View Post
Mine is a 6 . I had a Cat off an 8 which is longer but we bodged it on and it still failed!
PM if anyone knows a dodgy one!
Jx
PM'd
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Old 19-11-2020, 19:58   #5
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Dodgy git


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PM'd
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Old 19-11-2020, 20:00   #6
evo/nut
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Dodgy git
Never

Was trying to find out how much his VI TME RS going to be - and narda, not even the smallest of carrots was dangled
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Last edited by evo/nut; 19-11-2020 at 20:01.. Reason: typo's!
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Old 19-11-2020, 20:24   #7
Mita
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Millions donít you know.

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Never

Was trying to find out how much his VI TME RS going to be - and narda, not even the smallest of carrots was dangled
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Old 19-11-2020, 21:22   #8
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Very much doubt you'll find an MOT guy willing to risk their livelihood and business for a total stranger.

Perhaps it'd be better trying to find out why it's running rich.
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Old 19-11-2020, 22:15   #9
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Get your mapping checked as my vi has never had a cat and never failed a MOT,
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Old 20-11-2020, 01:42   #10
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Leave £50 next to the gear stick ;-)
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Old 20-11-2020, 05:13   #11
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Unless the law is indicative and states that one needs a catalytic converter present so as for the car to be able to take the MOT test, then there is no actual need for a catalytic converter to pass the emission test. HC, CO , CO2, can be mapped out to conform to the appropriate requested values the emission test dictates, once these are mapped out NOX will sort itself out. If you are on factory mapping, you'll not pass the test without a euro3 200cel cat, or a stock cat.


If you are on stock ecu/mapping, you really need to put the stock cat on it, as the ecu is mapped for emissions on that specific stock cat. The evo 8 cat, should get you through though, the two cats differ not only in external dimensions but in internal characteristics, as far as the combination of precious metals used, and that creates an incompatibility between the stock mapping and the cat, but if I remember correctly it is not at such degree that will not allow you to pass emissions. You also need to make sure that the oem O2 sensor is in proper working order and it reads properly.




Marios
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Old 20-11-2020, 06:38   #12
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Your after top money for the car looks very nice and you have bodged a cat on do it properly if potential buyers see this they will be thinking is any think else bodged to get the car away
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Old 20-11-2020, 07:51   #13
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Quote:
Originally Posted by jackg View Post
My EVO doesnít have a Cat and has failed itís MOT on emissions. Is there a way around this?
Ta
Jx
Quote:
Originally Posted by jackg View Post
Mine is a 6 . I had a Cat off an 8 which is longer but we bodged it on and it still failed!
PM if anyone knows a dodgy one!
Jx
Did you get the cat really hot just before testing the emissions, this often needs to be done to get evo's to pass

Stu
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Old 20-11-2020, 09:16   #14
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Quote:
Originally Posted by 4g638 View Post
Unless the law is indicative and states that one needs a catalytic converter present so as for the car to be able to take the MOT test, then there is no actual need for a catalytic converter to pass the emission test. HC, CO , CO2, can be mapped out to conform to the appropriate requested values the emission test dictates, once these are mapped out NOX will sort itself out. If you are on factory mapping, you'll not pass the test without a euro3 200cel cat, or a stock cat.


If you are on stock ecu/mapping, you really need to put the stock cat on it, as the ecu is mapped for emissions on that specific stock cat. The evo 8 cat, should get you through though, the two cats differ not only in external dimensions but in internal characteristics, as far as the combination of precious metals used, and that creates an incompatibility between the stock mapping and the cat, but if I remember correctly it is not at such degree that will not allow you to pass emissions. You also need to make sure that the oem O2 sensor is in proper working order and it reads properly.




Marios
Does this mapping adjustment apply to other Lancer models ? Can the Ralliart Sportback be tweaked in this way as I run the car decatted but put the cat back on for the mot.
Cheers
Brian.
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Old 20-11-2020, 10:04   #15
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Never

Was trying to find out how much his VI TME RS going to be - and narda, not even the smallest of carrots was dangled
Thereís one at SVA imports for 26k minus TME seats
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