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Message: [QUOTE="FaSSt9602, post: 1030083, member: 1872"] That is our yearly emissions test here in Phoenix. It is ***in awesome...:puke: They put a mirror and a sensor on the tail pipe and measure the smoke output. I pass with flying colors with less than 4 on the opacity test. Still makes me pucker my butthole reving the truck up like that... "Diesel vehicles in Maricopa County are tested using the Society of Automotive Engineers J1667 test protocol, commonly referred to as the "snap-acceleration test." The test consists of measuring the opacity of three, wide open throttle, no-load accelerations from idle to maximum governed engine speed with the transmissions in neutral. The average opacity for the three accelerations cannot exceed the applicable standard for the model year of the engine. The maximum allowable for engine model year 1991 and newer is 40 percent opacity, for engine model year 1990 and older the maximum is 55 percent opacity." [/QUOTE]

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