New here and question about CA laws...
Thread Starter
Teching In
Joined: Nov 2020
Posts: 2
Likes: 0
From: Fontana, CA
New here and question about CA laws... Hi! I made a login just for this question. I'm in the market for aa 2008 or 2009 Pontiac G8 GT. I've been shopping for a while and it seems almost every car I find is modded in some way if its outside of California. So that means I'll have revert the car to stock in order to make it pass smog. I've also heard that an unlocked or tuned ECM will not pass a smog test. Is there any validity to that? Is there a way to make a tuned ECM pass smog if that is the case? Appreciate the feedback, thanks!
TECH Senior Member
Joined: Jun 2016
Posts: 22,293
Likes: 3,617
From: Central Cal.
As far as the ECM goes, as long as the bit sum is same as original, and no codes come up, it should be good.
Equipment wise, keep it looking stock on the outside, and the cam tame enough to not throw any codes. Obviously long tube headers are out, and converters better be there in the stock location.
Nobody will know (or need to...) if your heads are ported or you are running different rocker arms or lifters.
Besides the visual, all they really do now is plug into the OBD2 and check for codes. Hence not wanting to show any.
Equipment wise, keep it looking stock on the outside, and the cam tame enough to not throw any codes. Obviously long tube headers are out, and converters better be there in the stock location.
Nobody will know (or need to...) if your heads are ported or you are running different rocker arms or lifters.
Besides the visual, all they really do now is plug into the OBD2 and check for codes. Hence not wanting to show any.
Thread Starter
Teching In
Joined: Nov 2020
Posts: 2
Likes: 0
From: Fontana, CA
As far as the ECM goes, as long as the bit sum is same as original, and no codes come up, it should be good.
Equipment wise, keep it looking stock on the outside, and the cam tame enough to not throw any codes. Obviously long tube headers are out, and converters better be there in the stock location.
Nobody will know (or need to...) if your heads are ported or you are running different rocker arms or lifters.
Besides the visual, all they really do now is plug into the OBD2 and check for codes. Hence not wanting to show any.
Equipment wise, keep it looking stock on the outside, and the cam tame enough to not throw any codes. Obviously long tube headers are out, and converters better be there in the stock location.
Nobody will know (or need to...) if your heads are ported or you are running different rocker arms or lifters.
Besides the visual, all they really do now is plug into the OBD2 and check for codes. Hence not wanting to show any.
Will a AFM/DOD delete make it fail smog?
TECH Senior Member
Joined: Apr 2002
Posts: 6,080
Likes: 17
From: So.Cal.
In CA, for cars built after 2007/2008, the CARB/BAR may have the original GM calibration id number and checksum/cvn on file (supplied by GM), and they compare against it.
For older cars, it seems to me that for some of these cars, they have the last cal id/checsum/cvn that they read during 2015/2016, and *may* compare against it.
.
For older cars, it seems to me that for some of these cars, they have the last cal id/checsum/cvn that they read during 2015/2016, and *may* compare against it.
.
Last edited by joecar; Nov 15, 2020 at 05:12 PM. Reason: clarification
