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 Post subject: MOT Emissions Limits
PostPosted: Sun Aug 07, 2016 7:40 pm 
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Joined: Tue Apr 09, 2013 12:12 am
Posts: 114
My Range Rover P38s MOT is due this week and I was wondering if it definitely should be tested with the non-cat emissions limits? The previous two years the car was tested as a petrol with a standard cat test. A few years prior at a different MOT station they always tested it with non-cat limits. Last year I removed the innards from my cats and welded them back up so it seems unlikely it will pass with the cat test limits.

So am I correct that it should be the non-cat limits on LPG?


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 Post subject: Re: MOT Emissions Limits
PostPosted: Sun Aug 07, 2016 8:12 pm 
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Joined: Mon Jan 23, 2012 12:21 pm
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Location: Milton Keynes
Theres been a post from Richard (Gillbertd) on here recently that covered this, will see if i can find it.


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 Post subject: Re: MOT Emissions Limits
PostPosted: Sun Aug 07, 2016 8:15 pm 
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Joined: Mon Jan 23, 2012 12:21 pm
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Location: Milton Keynes
It starts here http://www.lpgforum.co.uk/viewtopic.php?f=33&t=14097&start=20#p109158 - but theres links to the pages of the testers manual, which if you follow lead to it should be done as a non cat test if its presented running on Gas.


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 Post subject: Re: MOT Emissions Limits
PostPosted: Sun Aug 07, 2016 8:38 pm 
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Joined: Wed Apr 09, 2008 9:00 am
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As Brian says, if you turn up for test running on gas, it should be tested on gas but you may need to tell the tester or he could assume it is running on petrol and test to the petrol limits. The full testers manual is online here http://www.motuk.co.uk/manual/contents.htm

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 Post subject: Re: MOT Emissions Limits
PostPosted: Tue Aug 09, 2016 9:10 pm 
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My jaguar s type 3.0 V6 has been decated. I removed both cats (1 on each bank) knocked the inside of the cats out. It has passed 2 mot's like this with no problem.

I also decated my last car, a mg zt v6. I had the cat cut out and replaced with pipe and again passed mot's. The under tray covered the area which the cat was so you can't tell from under the car.

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 Post subject: Re: MOT Emissions Limits
PostPosted: Tue Aug 09, 2016 9:13 pm 
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Joined: Mon Feb 09, 2015 1:40 pm
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The up to date official manual is at https://mot-testing.i-env.net/documents ... 000001.htm, which has the flow charts needed to see what emissions regulations to use, most lpg cars on here will follow this route. Also because they do not qualify for a full catalyst emissions test they do not need a catalytic converter fitted. As has been stated inform the MOT tester it is running on lpg so they can use the correct standards.

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https://mot-testing.i-env.net/documents ... 000306.htm


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 Post subject: Re: MOT Emissions Limits
PostPosted: Tue Aug 09, 2016 9:43 pm 
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Joined: Tue Apr 09, 2013 12:12 am
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Thanks all. I took it for the test today and told them to test it on LPG and they gave it the correct emissions test this time. Passed with no advisories!

With empty-cats the emissions were CO: 0.682% and HC: 376ppm


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