I have taken my mpi for an mot and has failed it on lambda readings and CO being too high. The reading for the CO on the fast idle test came out as 1.76% (should be 30% vol). The lambda reading was 1.187 (should be 0.950-1.090).
I have got the following checked and still the readings are showing high. The emission levels are fluctuating.
MAP sensor checked.
Lambda sensor checked.
Replaced CAT with an after market.
Replaced coolant temp sensor.
Can someone advice what else I can do?
Thank you.
Mpi Lambda Sensor Reading Too High.
Started by
Help me!
, Oct 04 2014 07:16 PM
14 replies to this topic
#2
richmondclassicsnorthwales
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Posted 05 October 2014 - 06:31 PM
What is the condition of your oil for example?, if it has not been changed and is a bit dirty, this will no help.
#3
Ruckus
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Posted 05 October 2014 - 06:38 PM
Might be better posted in the actual injection forum :)
#4
Fast Ivan
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Posted 05 October 2014 - 07:22 PM
looks like its running rich and has to much oxygen coming out the tale pipe
my guess would be an air leak, assuming they are both related
how's the service condition of the car?
how were the sensors checked?
#5
Help me!
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Just On Tickover
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Posted 06 October 2014 - 09:06 PM
It went through a full service in June with wood & Pickett. Oil looks good.
Have been checked for air leaks and none detected. The service condition is good.
I will try to post it onto the injection forum too.
Any more ideas?
Have been checked for air leaks and none detected. The service condition is good.
I will try to post it onto the injection forum too.
Any more ideas?
#6
Help me!
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Just On Tickover
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Posted 06 October 2014 - 09:07 PM
Sensors were all checked by mini speed and they all confirmed good.
#7
FlyingScot
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Posted 06 October 2014 - 09:31 PM
Moved to injection
FS
FS
#8
FlyingScot
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Posted 06 October 2014 - 09:37 PM
Is the car standard? Any mods made? Were tappets done at the service?
FS
FS
#9
Help me!
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Just On Tickover
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Posted 13 October 2014 - 09:48 AM
Its a cooper 1.3 mpi and in 2013 i had the manifold and air filter upgrade done which increased my bhp. Since then nothing changed. This work was done in May 2013 and the Sept MOT passed without any issues. No tappets changed at the service.
#10
Ruckus
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Posted 13 October 2014 - 11:03 AM
was the car run before the test? It helps to have the Cat HOT.
how many miles has it done?
#11
Help me!
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Just On Tickover
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Posted 13 October 2014 - 12:29 PM
Yes I did about 7 miles to get to minispeed. it has done 77K miles.
#12
Ruckus
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Posted 13 October 2014 - 01:46 PM
sound like it should have been hot enough, and you would hope at 77k cam wear would not be a problem.
I'd get it on a proper T4 Diag see what it shows up.
#13
Fast Ivan
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Posted 13 October 2014 - 07:51 PM
Sensors were all checked by mini speed and they all confirmed good.
what was the lambda doing?
#14
Phil-R
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Posted 13 October 2014 - 08:07 PM
sound like it should have been hot enough, and you would hope at 77k cam wear would not be a problem.
Going slightly off topic (sorry op), Ruckus you just reminded me of this...
http://miniclassic.y...es#.VDwvj_ldVGs
Check out the wear on the 18k miles cam halfway down the page
#15
Ruckus
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Ice Ice Baby!!!
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Posted 13 October 2014 - 10:50 PM
sound like it should have been hot enough, and you would hope at 77k cam wear would not be a problem.
Going slightly off topic (sorry op), Ruckus you just reminded me of this...
http://miniclassic.y...es#.VDwvj_ldVGs
Check out the wear on the 18k miles cam halfway down the page
Yes I was educated many years ago by Adrain about building an engine up, not down when he built an engine for my wife's car. 1275, smooth cam, 91bhp and no high lift rockers to be seen...
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