Click and Clack: Failed inspection presents a catch-22

Dear Tom and Ray:

Goofy problem here: We were loaned a Jeep Cherokee by our daughter and son-in-law while our vehicle is being repaired. With a catch, of course: It needed a “speed sensor” in order to pass the emissions test. We got the part, had it installed and promptly failed the emissions test. We were told that we needed to put 50-100 miles on the thing before they could retest the emissions. Is that standard for electronic (or computer-ish) parts? Is there some rationale I’m missing on that? Basically, I need to know so I can tell the judge why I’m driving without an inspection sticker. How are you supposed to put 100 miles on the car in order to get it inspected if you’re not supposed to drive it until it passes inspection? Thanks! — Nan (more…)