Hjartarson

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?

gt4awd

Do you have it tuned? Maybe running rich is causing the issue. I would also find a different emissions shop to test again.

Hjartarson

It's stock and the emissions have been tested in 3 different places.

gt4awd

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?

Hjartarson

I'm not sure how they diagnosed it, but the official state inspectors said that the cats were ok. Car has 80k miles.

Zeppelin

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.

evanoel

Hi Hjartarson,

I have exactly the same problem:
- failing emissions test
- No code on the OBD
Did you find a solution to your problem?

Thanks!

wc124

Hi Hjartarson and Evanoel,

Same problem, how did you solve that problem?

02C32guy

When this happened to me, the culprit was a bad coil pack.

wc124

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.

02C32guy

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.

wc124

"Star" should be show malfunction of coil packs?

evanoel

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!

NTX

Sorry about refloating that thread pals! I have the same problem, it is driving me crazy.... Anyone could solve it at last?

Thanks in advance!