when I ran a shop in Merced in the late 1970's, smoke tickets were pretty common. Back then, they actually ran roadside smog tests- - - -pull a vehicle over at random and stuff the tube up the tailpipe! We did a lot of engine repair to clear "excessive emissions" tickets. Another cash cow for politically-connected shop owners was getting state certified as a "headlight aiming station"!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!