Hey guys. My smog check is due soon and I have a couple questions. 1) The speedo needle bounces a little bit around 15 mph and very slight at 25 mph (the speeds the test is done at). Would this be something that the tech could fail me for? 2) I'm looking at replacing/upgrading the injectors. The ones on the motor now are the originals with over 190k on them. I've noticed that at high RPM with full boost I got a little bit of knocking and every so often its hard to start the car. I'm guessing I should get these replaced before the test, right? If so, would going from stock flow injectors to 32 lb. injectors make that much of a difference? And is there any "break-in" time for the car after doing this (i.e. learning time for the PCM)? Thanks a bunch for the help.