Hi, I am a former California Smog Tech. I moved from the Left Coast in 1998 so I have been out of the loop for some time. I understand the Tech not wanting to "Pretest" We were required to scan the barcode on our license before we could start the test. We were required to manually exercise the EGR valve and note a drop in RPM. I know that 12 years ago that behind closed doors the test could be faked. You test a good vehicle but enter the data for the vehicle you want the cert for. We had manuals that specified all the smog equipment that was required. When in doubt, the customer would have to take his vehicle to a Cal Referee.