Factory emission testing
Thread Starter
Melting Slicks
Joined: Feb 2018
Posts: 2,126
Likes: 1,012
From: North Texas
Factory emission testing
I often wondered how the factory makes the ECU indicate that the car passes emissions. In other words after the car is assembled, I know they don't drive it a couple hundred miles, how do they get the car to output a passing emission. How are all the monitors set to pass? Anyone have any actually information on this process?
Racer
Joined: Feb 2015
Posts: 282
Likes: 69
From: Granbury Texas
Straight from the factory they won't pass some emissions testing depending on the level of testing done. To pass in California the engine will need multiple starts / driving to pass.
Last edited by Gvnski; Feb 20, 2020 at 08:45 PM.
Safety Car
Joined: Dec 2012
Posts: 3,828
Likes: 1,845
From: St. Louis Metro East IL
Some states don't require emissions testing for new vehicles. In those parts of Illinois requiring testing (Chicago and St. Louis areas) a new vehicle does not need to be tested. The first test is at 4 years, then every 2 years. Each state is different.
Ron
Ron
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If your state requires emissions, best to check with the agency administering the testing program to see what the requirements are.
Burning Brakes
Joined: Nov 2016
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From: San Dimas CA
Thread Starter
Melting Slicks
Joined: Feb 2018
Posts: 2,126
Likes: 1,012
From: North Texas
But I still wonder if the factory has a special back door program to the ECU to 'force' load' an 'all ready' state'.
If they did, I and others would love to have it.
Drifting
Joined: Feb 2005
Posts: 1,440
Likes: 173
From: San Jose Ca
Understatement of the year right there! Sure would make my life easier.
And I believe California gives you four years before requiring a "smog" test, which is really just a plug in and download of monitor status through the obd2 port. And a visual check.
And I believe California gives you four years before requiring a "smog" test, which is really just a plug in and download of monitor status through the obd2 port. And a visual check.
Thread Starter
Melting Slicks
Joined: Feb 2018
Posts: 2,126
Likes: 1,012
From: North Texas
Where I worked the software guys always had a way or backdoor to their software and they could make it do whatever they wanted. It was needed so they could constantly build, tweak and mod as the hardware team continued development.
Im sure and would bet money that GM also has this ability if not they the software developers would have a horrible time. Too bad this is probably almost a state secret punishable by death!
Once again, who has a copy on their iPhone?
Im sure and would bet money that GM also has this ability if not they the software developers would have a horrible time. Too bad this is probably almost a state secret punishable by death!
Once again, who has a copy on their iPhone?
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