The time for my next emssions test came due again. Last time it barely passed so I was very nervous about this time. I took it in a few weeks ago and they couldn't test it because the tailpipe had come rusted out of the muffler. A buddy hooked me up with a local Merlins who replaced the exhaust from the cat back for $150. I took it back expecting it to fail, but praying it would pass. The test took much longer than other cars were taking and they were reving the heck out of it. It did pass!!! The reason it took so long was that it failed on a first attempt, so they do a retry. It passed the second attempt. Before the test I ran a bottle of 'Guaranteed to Pass - Emissions Formula' through a tank of gas, then changed the oil and refilled the tank. I don't know for sure if this stuff does anything but I've used in on my last 3 testing of older cars and they have all passed. The numbers this time were very different from last time. The test must be different.
Test Allowed My Tracker
HC 1.018 .493
CO 17.655 17.503
CO2 No requirement 442.5
Last Time
Test Allowed My Tracker
HC .408 .400
CO 6.318 3.032
CO2 No requirement 106.2
So last time my HC were at the limit, now they are fine but my CO's are at the limit. What's it mean?