I have read through all 9 pages of this damn thread 3 times now. i am not sure of the answer to my question STILL. i bought an 01 GTP, the cat has been removed, i have a P0420 code, thats it. i have a bluetooth OBD2 dongle and Torque Pro app. everything has passed except for the cat test, due to that code/no cat. i live in MA so i will need to pass emissions. assuming they dont do a sniffer or a visual check(im pretty sure i can go to a place that wont do sniffer/visual), just a scanner check, how do i pass inspection without buying a friggin cat and having it welded in and without spending tons of money on a pcm or a tune? ive heard the code sometimes comes up with an aftermarket high flow cat, and 2 spark plug non foulers on the rear o2 will slow it down enough to pass, but what about with no cat at all? if non foulers wont work, can i just download the free tiny tuner and set the diag to pass so i can get a sticker?
***i am assuming since the test has run and failed to pass and set a code, it is not continuously running and fudging up anything and dumping fuel. if this is the wrong assumption someone let me know!"
