Hi Everyone,

Did a search and didn't really find any answers; hopefully someone here has an idea.

Went to get my emissions test. I figured that I would be able to get it done before doing an oil change (my mistake), so I went ahead. Took the car for a good drive and it was warmed up.

Ended up failing. Not entirely sure what's wrong; the one thing I have done since then is changed the oil. Wondering if I should do anything else. If anyone has any ideas please feel free to share:

Here are the results
2001 Carrera 4
2500 RPM test = Pass
HC ppm = 5 (allowable 150)
CO% = 0.01 (allowable 0.70)
RPM = 2421
Dilution 14.1

Idle RPM test = Fail
HC ppm = 80 (allowable 150)
CO% = 4.46 (allowable 0.70); yes 4.46!!
RPM = 788
Dilution = 11.1

Again, if anyone has any ideas please let me know. Would an oil change fix all of this?

The mechanic said prior to the test, that if there was no CEL, the Porsche would be fine. After the fail, he said perhaps the oxygen sensor as he thinks its running rich, however no CEL is present.

 

Oil change has nothing to do with this issue. You've something very wrong with emission system. Even though a CEL has not lit up, there will be codes throw that a Porsche dealer should be able to easily read out and correct. I don't know about Canada, but in the US the emissions system warranty is longer than the base warranty. If you have a K&N oil based air filter it can foul the MAF. I'd put a paper filter on for all test purposes.