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Message: [QUOTE="Luke@MillerPerformance, post: 1397951, member: 12303"] Hears the run on CA smog: 98-07 OBD Check - No codes and all supported monitors must be run. This is the hardest part since some 7.3s hate life and won't run the comprehensive monitor. The smog machine does not check VIN number, what file is flashed in the truck, if it's even the right year, etc. It's a code reader that's verifying monitors. Snap test - most smog techs do this wrong. It's a gradual application of the throttle over 3 seconds, then a 3 second wait to look for visible smoke. My 6.0 with 190/75s will pass this on a stock file. Visual - This is were it comes down to the smog techs knowledge of diesels. Most of them hate diesel smogs, mostly because the state gives them some serious BS for guidelines on what is stock. It pretty much comes down to: "is it bright blue? If yes, fail for visual" Technically a Regulated Return is not required to have an EO number since it just new plumbing for the fuel system, but most smog techs don't go by this if they notice it. Your T4 kit will come down to the techs knowledge of what stock is supposed to be. [/QUOTE]

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