NO.....that is not true. All the "sniff" test does is check to see if your computer is sending codes saying that something on your car is malfuntioning...i.e. the cats. If your computer thinks that they are functioning properly with the off road pipe, via a chip or MIL eliminators, you will pass emissions. Trust me, I have done it in my county, not saying all counties are the same. All they do is put it in your tail pipe to see if your cats are working properly, if they are, or your car "says" they are then you pass. You may fail a visual inspections unless you have a prochamber in which case you can say that it is a high flow cat in the box or something like that. I don't know of anyone who has failed with the MIL eliminators installed and functioning properly. Sniff test have nothing to do with air/fuel ratios;which off road pipes change slightly unless you get it corrected with a chip.
__________________
Black 99GT Coupe with Goodies...check back for an update 
|