|
||
|
23rd October 2019, 08:13 | #1 |
Loves to post
Connoisseur SE v8 auto '54 Join Date: Jan 2009
Location: West Sussex
Posts: 488
Thanks: 105
Thanked 56 Times in 41 Posts
|
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 |
This is my second home
Rover75 and Mreg Corsa. Join Date: Nov 2006
Location: Sumweer onat mote o'dust (Sagin)
Posts: 21,753
Thanks: 341
Thanked 3,660 Times in 2,924 Posts
|
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, 14:30 | #3 | |
This is my second home
2007 57 GOLF GTi EDITION 30 DSG Join Date: Nov 2011
Location: Newport Shropshire and Coventry.
Posts: 5,138
Thanks: 2,424
Thanked 1,452 Times in 852 Posts
|
Quote:
|
|
23rd October 2019, 17:47 | #4 |
Loves to post
Connoisseur SE v8 auto '54 Join Date: Jan 2009
Location: West Sussex
Posts: 488
Thanks: 105
Thanked 56 Times in 41 Posts
|
|
23rd October 2019, 18:10 | #5 |
This is my second home
Rover75 and Mreg Corsa. Join Date: Nov 2006
Location: Sumweer onat mote o'dust (Sagin)
Posts: 21,753
Thanks: 341
Thanked 3,660 Times in 2,924 Posts
|
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 | #6 |
I really should get out more.......
MG ZT 180+ auto Join Date: May 2016
Location: Ilkeston, Derbys
Posts: 2,743
Thanks: 285
Thanked 1,128 Times in 504 Posts
|
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! ☺
|
24th October 2019, 05:41 | #7 |
Loves to post
Rover 75 Saloon Join Date: Mar 2017
Location: Newtown
Posts: 415
Thanks: 273
Thanked 95 Times in 65 Posts
|
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!
|
24th October 2019, 07:10 | #8 | |
Give to Learn
Freelander 2 Join Date: Aug 2010
Location: West Midlands
Posts: 18,717
Thanks: 1,155
Thanked 6,407 Times in 3,874 Posts
|
[QUOTE]
Quote:
Martin. Give it a good hard run about 30 minutes before your MOT allowing you to then turn up 5 minutes before your appointment place with a nice hot engine it will pass the exhaust test easy.
__________________
Arctic Givology Learn to Give Everything is Achievable ad altiora tendo. Check out our Nano meet dates http://www.midlandsnanomeets.co.uk/ http://www.the75andztclub.co.uk/index.php?thepage=howto " You do the work , we supply the expertise " Last edited by Arctic; 24th October 2019 at 22:41.. Reason: spelling |
|
24th October 2019, 11:06 | #9 |
Discount MG Rover Spares
Rover 75 CDTi, 2x MG ZS180 Join Date: Jun 2011
Location: Hythe, Southampton
Posts: 11,320
Thanks: 456
Thanked 3,377 Times in 2,027 Posts
|
As Arctic says, catalytic converters need to be hot - so a good 'Italian tune up' is usually enough to get the emissions within limits.
__________________
Your trusted MG Rover specialist! Tel: 02380 001133 / Email: [email protected] We now have a 'chat' function on our site for even quicker replies. Give it a try! Remember - discount code FORUM5 for 5% off |
24th October 2019, 19:01 | #10 |
I really should get out more.......
MG ZT 180+ auto Join Date: May 2016
Location: Ilkeston, Derbys
Posts: 2,743
Thanks: 285
Thanked 1,128 Times in 504 Posts
|
That's why my car nearly failed - took it nice and hot but they parked it up from 2pm to 5.15pm before testing! I think it definitely needs a good blast as well with how its not been used enough.
|
|
|