Any LPG/MOT/Catalytic converter experts here?

lordgaz

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Hi All
I bought my 2000 mercedes with LPG conversion (it is registered as LPG also on the registration document) , and the rear CATS were not present.

It has passed 3 years of MOT's since I've had it, being presented on LPG to the MOT station each year.
This year (ie - today) I took it to a different station, presented on LPG, but was told it is automatic fail as the rear CATS were missing. Can anyone confirm if this is 100% correct to fail an LPG presented car in this way>? "New Rules" - mention of which I cannot find anywhere.

(it certainly passes the emissions test when tested as LPG)

Many thanks in advance.

Gaz
 

EXMERCTECH

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LPG or Petrol
Missing Cats is a Fail
Could be your original garage was too easy.
Or the New Station you used today is playing by the rules.
 
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lordgaz

lordgaz

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Thank you for the reply - I just phoned the DVSA and spoke to someone who agreed it should not be a fail if registered as LPG and presented on LPG - So the plot thickens - I am waiting for something in writing to confirm (unless the person answering the email has a different opinion to the call handler).
 

Wighty

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Thank you for the reply - I just phoned the DVSA and spoke to someone who agreed it should not be a fail if registered as LPG and presented on LPG - So the plot thickens - I am waiting for something in writing to confirm (unless the person answering the email has a different opinion to the call handler).
Even if it's registered LPG , does it still start up on petrol until it's warm to switch over to lpg ? In which case it would need the cats for the start up cycle ?
 
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lordgaz

lordgaz

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It can start on LPG, but in practice it normally starts on petrol for 1 minute and then switches to LPG (long before a Catalytic converter would be heated up to working temperature anyway) -

Just as a side thought - checking the VIN decoder for my vehicle - It was ordered in Kuwait in 1999 - I wonder if there was an option to not have rear cats? eg - Did it ever have them? (clutches at straws!)
 

LostKiwi

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There's an option for no cats (code 918 from memory) but not front cats only as far as I'm aware.
 
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lordgaz

lordgaz

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This has now been solved. I have it in writing from the DVSA that a vehicle presented for an Mot on LPG does not require CATs..


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