My 1998 C70 passed the safety inspection with flying colors on Thursday, but failed emissions because the drive cycle had not been set. The PO installed a new battery, and I had disconnected the battery when I was using an impact wrench on the struts (I didn't want to risk set off the airbags)

What I did not know is that in Missouri the car has to have a full drive-cycle on it before it can even be tested - much less pass ODBII emissions.

Anyway, service station guy told me to take it out, put at least 100 miles on the car and bring it back for the retest.

I went on a 2-hour drive around the metro area through start-stop rush hour traffic and put over 114 miles on the car. I took it back today and it still tests as "not ready" He printed off the drive-cycle info and gave it to me. I believe that I did everything required, but I've got no way of knowing when I cross that threshold.

Can anybody give some advice here - aside from drive the unlicensed car around for another 100+ miles and blindly try again?

I've never heard of anything like this - but this is the first post-1996 car I've ever owned.