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23rd October 2019, 08:13 | #1 |
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Connoisseur SE v8 auto '54 Join Date: Jan 2009
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MoT failure query
Considering buying another v6. One that interests me nearby has this frequent MoT failure (well thrice in the past six years). What may be the cause and solution?
"Exhaust carbon monoxide content after 2nd fast idle exceeds manufacturer's specified limits (8.2.1.2 (a))" |
23rd October 2019, 08:49 | #2 |
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Rover75 and Mreg Corsa. Join Date: Nov 2006
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Two factors cause this. A failed catalytic converter won't reduce what CO is generated to the required level. The CO level can also be too high due to poor combustion. This relates to the air/fuel ratio as controlled by the ECU. The level in the exhaust gas before entering the catalyst is typically1% or so, which is converted to carbon dioxide within the catalytic converter. A T4 session may identify poor fuelling. The need for a catalytic converter replacement is quite likely I'd say.
TC |
23rd October 2019, 17:47 | #3 |
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23rd October 2019, 18:10 | #4 |
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Rover75 and Mreg Corsa. Join Date: Nov 2006
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The original MGR catalysts were. You can now buy a decent 75 for what Xpart/Rimmer once charged. Catalytic converter prices vary widely like anything else car-shaped. Basically, you usually get what you pay for. Rimmer price is currently £220 for an OEM alternative. Maybe try DMGRS? Xpart/Rimmer: https://rimmerbros.com/Item--i-GRID001949 TC |
23rd October 2019, 20:12 | #5 |
I really should get out more.......
MG ZT 180+ auto Join Date: May 2016
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My car stood for 2 years and did/does short trips. I have been advised a blast at low revs with Cataclean in might help. Hust running fuel down enough this week to do it this weekend! ☺
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24th October 2019, 05:41 | #6 |
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Put a bottle of cataclean in Moonstone last week before a blast down the motorway to nano meet. Going for MOT tomorrow, will see what happens!
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23rd October 2019, 14:30 | #7 | |
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2007 57 GOLF GTi EDITION 30 DSG Join Date: Nov 2011
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