Failed smog
 

After years of great smog tests my 85 3.2 it finally failed smog. What failed was the HC at 117, max allowed 97. My experienced tech said a new oxygen sensor could be my problem. I went online to look at them and some of them require cutting/ splicing wires. Are there any sensors out there that just plug in on reinstall? Thanks, Nick

Never mind, I just realized that there are two types, OEM and universal. Anyway, I hope the new one works. HC is the only thing that failed.

hi Nick..what was the co measurements?
ivan

HC is unburnt fuel right? Luckily we don't have experience of this - but what if you leaned the idle mix out? too simple?
Alan

CO was 0.29 at 15 mph and 0.31 at 25 mph.

nick it is too lean....

OK, I understand. But what would change a system that was fine to be too lean? It has only been about 6000 miles since my last test?

that is a lot

What's the time period for that 6k miles. 2 years?

Yup, about two years. Ill check after I fix my 02 sensor engine plug connector that broke while removing the rubber sleeve.

Vacuum leak?

Isnt your car exempted yet? 25 yrs and older, no? mine is an 87 and i put in a cat bypass

We are talking Kalifornia here. In Kalifornia depending on which zip code you live in, a smog check on '75 and newer cars may be required.

As long as you all can keep a secret.

When my dad passed away a few years back, I inherited his 1977 911 S. I’m in Kalifornia as you referred, and was facing a real conundrum. When I went to transfer the car into my name, the nice lady behind the counter said the car is a bi-annual smog car. My dad lived in a county that did not have to smog vehicles so I assumed I was screwed. Well the lady told me t list his street address first, then mine underneath on the title. Well needless to say, I get the registration every year, but never have to smog the Porsche. The DMV thinks the car still lives in a non-smog county. I don’t take what the angel at the DMV did for me for granted! Loopholes!


Sent from my iPhone using Tapatalk