calif smog test
The thing I'd be concerned about is the tune being identified as non-stock due to an unknown checksum, but that subject hasn't come up in a while and I never saw anything conclusive.
The Technician conducting the smog check/inspection may or may not identify any non CARB certified parts, such as catalytic converters. It also depends on the algorithms built into the test console software to detect a modified PCM such as what a Jaguar main dealer can detect.
If there are no pending or permanent DTCs stored, the vehicle may pass with the modifications the OP mentions. If not, hopefully it can be returned to the factory default parameters for a retest.
If there are no pending or permanent DTCs stored, the vehicle may pass with the modifications the OP mentions. If not, hopefully it can be returned to the factory default parameters for a retest.
You should be fine. The tune didn't affect me at all. It's the visual that'll getcha. Pulleys are fine, they likely won't even know the difference. Cats however, can fail you. Especially since they say velocity ap on it🤦🏾♂️.
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I just had my wife's Cayenne smogged last week and asked the owner of the smog shop [test only] what his opinion was on my tuned F type. He told me that he has had four or five tuned cars fail since the law went into effect [none were F types]. They all rolled back the tunes and subsequently passed. He also mentioned that he has absolutely no control over the process what-so-ever.
He suggested I do the same [plus drive the car for a hundred miles or so after the de-tuning to reset]. Mine's not due until '26 so I am not sure I'll even have the car by then [although it must be smogged when sold].
He suggested I do the same [plus drive the car for a hundred miles or so after the de-tuning to reset]. Mine's not due until '26 so I am not sure I'll even have the car by then [although it must be smogged when sold].
I just had my wife's Cayenne smogged last week and asked the owner of the smog shop [test only] what his opinion was on my tuned F type. He told me that he has had four or five tuned cars fail since the law went into effect [none were F types]. They all rolled back the tunes and subsequently passed. He also mentioned that he has absolutely no control over the process what-so-ever.
He suggested I do the same [plus drive the car for a hundred miles or so after the de-tuning to reset]. Mine's not due until '26 so I am not sure I'll even have the car by then [although it must be smogged when sold].
He suggested I do the same [plus drive the car for a hundred miles or so after the de-tuning to reset]. Mine's not due until '26 so I am not sure I'll even have the car by then [although it must be smogged when sold].
Restore original file, drive a bit (a few trips, some miles, some start/stop), stay out of the high-throttle/high-rev zone to avoid an overboost CEL, pass the test, and Bob's your uncle. Oh, and check that you don't need to do a battery reset afterwards.
Why borrow trouble when restoring the stock file is so simple? It takes less time than having to go for a retest, plus avoiding a failure for cause on the record is not desirable.
Restore original file, drive a bit (a few trips, some miles, some start/stop), stay out of the high-throttle/high-rev zone to avoid an overboost CEL, pass the test, and Bob's your uncle. Oh, and check that you don't need to do a battery reset afterwards.
Restore original file, drive a bit (a few trips, some miles, some start/stop), stay out of the high-throttle/high-rev zone to avoid an overboost CEL, pass the test, and Bob's your uncle. Oh, and check that you don't need to do a battery reset afterwards.
CA test is all remote OBDll plug-in test. any mod to the ECU will show up and fail on-line at the state data center. you will also get flagged to get a full inspection by a referee.
oh, and a fine most likely.
oh, and a fine most likely.
Since they no longer stick a sniffer up the tailpipe, how would they know you are running a tune, unless it’s throwing codes? And if your tune is running too rich, you’re just throwing away gas. If someone dies a proper tune, you’re just throwing can read it in the spark plugs. If the porcelain is suite, you’re running to rich.









