Emissions on one bank out
#1
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Hello!
My car has had the MOT today, and it failed on one thing badly.
Emissions on one bank was way out, something like 9% CO.
What can be possible causes:
1) I changed the upper timing chains and tensioners last autumn.. Can one bank be out of phase?
2) Electronics. What happens if one of the Lambda sensors goes bad?
Anyone experienced the same? Engine runs fine, no issues apart from nostart issue because of cylinder wash once this winter.
Ideas anyone?
Cheers, Jarle
My car has had the MOT today, and it failed on one thing badly.
Emissions on one bank was way out, something like 9% CO.
What can be possible causes:
1) I changed the upper timing chains and tensioners last autumn.. Can one bank be out of phase?
2) Electronics. What happens if one of the Lambda sensors goes bad?
Anyone experienced the same? Engine runs fine, no issues apart from nostart issue because of cylinder wash once this winter.
Ideas anyone?
Cheers, Jarle
#2
![Default](/forum/images/icons/icon1.gif)
Hello!
My car has had the MOT today, and it failed on one thing badly.
Emissions on one bank was way out, something like 9% CO.
What can be possible causes:
1) I changed the upper timing chains and tensioners last autumn.. Can one bank be out of phase?
2) Electronics. What happens if one of the Lambda sensors goes bad?
Anyone experienced the same? Engine runs fine, no issues apart from nostart issue because of cylinder wash once this winter.
Ideas anyone?
Cheers, Jarle
My car has had the MOT today, and it failed on one thing badly.
Emissions on one bank was way out, something like 9% CO.
What can be possible causes:
1) I changed the upper timing chains and tensioners last autumn.. Can one bank be out of phase?
2) Electronics. What happens if one of the Lambda sensors goes bad?
Anyone experienced the same? Engine runs fine, no issues apart from nostart issue because of cylinder wash once this winter.
Ideas anyone?
Cheers, Jarle
Cam sensor on one bank..
No ideas guys?
#5
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Cheers, Jarle
#6
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I guess the Lambda stops working at 3500 rpms or something?
If my mixture above that is perfect, then it is likely that this is the problem?
No one else has any input?
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#8
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#10
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Not much you can do with this one without a scanner and the car in front of you. Do you have any check engine lights? I assume no. At that point its a matter of taking real time readings with a scan tool and see what is out of limits. So to be of such little help.
Thanks for chiming in...
Cheers, Jarle
#11
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sometimes these issues are just outside of our ability to help, or even guess without some direction on where to go, via the codes. If you ever find yourself needing a scanner, we've got a 'member approved OBDII scanner' thread in the off-topic section that can offer some examples. I've found mine has paid for itself a couple times over in avoided shop visits.
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