Quote:
Originally Posted by KingLT1
On 2017+ If you remove cats or anything emissions related on your car, start it, let the ECU cycle through it's emission tests, and it detects any issue, you will get a hard(permanent code) until resolved. Even if you go in the tune and disable the codes after the fact, they will remain permanent and will require putting all of the emissions stuff back in place, so the ECU can complete it's emissions cycle before the permanent code will disappear. Now this doesn't hurt anything per say, but if you live in a state where they check with a scanner, you may be screwed.
The ideal order of operations for those modding cars is to disable any codes in the ECU prior to starting the engine post mods.
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Now this is what I'm talking about. Thank you for the clarification KingLT1
So in layman's terms, I cant go installing my headers, then go driving to the tuner when it's convenient to get a tune like I did with my LS1 stuff. Instead I would have to expect these PITA perma-codes.
I guess the bottom line for me is either buy a tuning suite and learn how to tune or have the headers installed by a good shop. At this point, I'm just a wrench turner, no knowledge of messing with the ECM whatsoever
