C32 failing emissions test
Thread Starter
Member
Joined: Apr 2007
Posts: 92
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From: Iceland
2002 C32 AMG
C32 failing emissions test
Hi all,
I'm having some issues renewing my license plates. The process requires a tailpipe reading at idle RPM and another at ca 2000 RPM. My car is failing these tests miserably. The readings show about 4.5% co2 in both tests, but it should be <0.5%.
I've replaced the spark plugs and wires, as well as the upper oxygen sensors. I've taken the car to 2 different mechanics and they are both baffled. The car throws no emission related codes at all. The cats are fine according to the official inspectors.
I tried the search function, but I didn't find anything useful. Has anyone encountered this problem?
I'm having some issues renewing my license plates. The process requires a tailpipe reading at idle RPM and another at ca 2000 RPM. My car is failing these tests miserably. The readings show about 4.5% co2 in both tests, but it should be <0.5%.
I've replaced the spark plugs and wires, as well as the upper oxygen sensors. I've taken the car to 2 different mechanics and they are both baffled. The car throws no emission related codes at all. The cats are fine according to the official inspectors.
I tried the search function, but I didn't find anything useful. Has anyone encountered this problem?
Thread Starter
Member
Joined: Apr 2007
Posts: 92
Likes: 0
From: Iceland
2002 C32 AMG
MBWorld Fanatic!
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2005 Pontiac GTO 6.0 LS2 - Blue
Right away would assume it's the catalytic converters. I know the mechanics said it's not but how did they diagnose that? You can't always trust the opinion of a mechanic... How many miles does your C32 have?
Thread Starter
Member
Joined: Apr 2007
Posts: 92
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From: Iceland
2002 C32 AMG
I'm not sure how they diagnosed it, but the official state inspectors said that the cats were ok. Car has 80k miles.
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From: OC
C32
You must mean your CO% was at 4.5, not the CO2. As the CO2 should be in the 5-15% range.
Only time I have had my CO% higher than like 0.6% is when I had a bad Cat Converter on my Honda. It also had sky high HC. Not saying that is it but there is a test they can run to see if it is a bad Cat.
Only time I have had my CO% higher than like 0.6% is when I had a bad Cat Converter on my Honda. It also had sky high HC. Not saying that is it but there is a test they can run to see if it is a bad Cat.
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Thanks for your advice. How did you find out that solution / diagnosis? Should "Star" or "Autocom" show something? I´m really frustrated to find out solution for a "high emissions values". "Diagnostic tools" show no malfunction.
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Joined: Apr 2009
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From: DE
2005 E55
The star didn't really show anything other than an emissions code. I went to change the plugs and wires to get it to pass emissions and when I did, I saw that one of the coil packs was corroded.
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c32 amg
Hi all,
From my side, no solution yet. My problem with the coil pack is to detect the issue. Anyway, I will try a visual inspection... A full change, without evidence, is risky.
Thanks for activating this subject!
From my side, no solution yet. My problem with the coil pack is to detect the issue. Anyway, I will try a visual inspection... A full change, without evidence, is risky.
Thanks for activating this subject!
