86.5 emissions failed the Cali Smog Test

[Rennat]

A GREAT THANK YOU to one and all. It turned out that my son had disconnected the O2 sensor and I had to blow out the EGR modulator and I can now drive as a "nonpolluter". Many thanks to all who posted suggestions and additional information. With an ohmeter, paper clip and my vac guage I can get around the engine issues quite nicely now. I'll come back to visit... still own the darn thing!

 

[jetjock]

So it was in open loop? No stoichio mixture to the cat there eh? Measuring the 02 sensor must have been a surprise. That must be a good cat you have on there to bring the HC and CO down. It was working hard though. This is a classic example of why a new cat should not be used to pass emissions. And the EGR was partially clogged? No wonder NOx was high. Odd it was high with a rich mixture though. Anyway, good show on finding it and thanks for letting us know.

 

[Rennat]

I did pass but the HC was 123/68 @ 15mph/25mph. Actually all my 15mph readings are high but the 25 mph are well within ranges. Thanks again.

 

[Big Wang Bandit]

Mine were about on the same level at 15mph. Ive got an 87 that has failed multiple times under previous owners and had even been labled as a gross polluter hehe.