It's a sad day
Off topic question for those who have returned to stock...did it unlock the tuner? I tried that once and even though it loaded the stock tune, it said it was still locked to the truck. What else do you have to do to unlink it?
I think under options it says remove VIN lock or something and I'm assuming it deletes all your truck's files from its internal memory once its back to stock. another off topic question..the pipes from the cats to the y pipe are 2.5" too right? So its 2.5" in and 2.5" out right?
Site Moderator
Joined: Jan 2008
Posts: 8,374
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From: Sioux Falls, SD
To unlock it, I believe you have to "unload" everything. Not just the tune, any changes you made to tire pressure system, speedo, etc. etc. If you leave even one thing on, it will stay locked to your VIN.
Champion
Joined: Aug 2009
Posts: 3,971
Likes: 91
From: Jersey
You probably would have passed inspection if you had done nothing. Any time you reset your PCM, with either a battery disconnect, tune install, or dealer reflash, your truck goes through a system check.
As you drive the computer has to test each system to make sure it is OK. The problem is that it can only test each system under certain driving situations so it maintains a system called "readiness monitors". Each readiness monitor is set to either "Ready" or "Not Ready" depending on whether the computer has had a chance to test it or not. If a system is tested and it does not pass the test, it sets the CHECK ENGINE light. If a system is tested and it does pass, then the light stays off and its readiness monitor is switched to "Ready".
When you get scanned for your emissions test, it checks to make sure all of the systems have been switched to "Ready". This prevents someone from disconnecting the battery and clearing the computer's memory and then slipping it through the test before it has a chance to turn the light back on again.
---But then again, I took my car through and failed (2 sensors 'Not Ready') for the same reasons while it was tuned. I drove it with the tune for a few hundred miles and couldn't get it to pass after 3 tries. I returned it to stock and drove a couple hundred miles and finally passed. So in two years, I will probably return my car and truck to stock well before to get an easy pass.
As you drive the computer has to test each system to make sure it is OK. The problem is that it can only test each system under certain driving situations so it maintains a system called "readiness monitors". Each readiness monitor is set to either "Ready" or "Not Ready" depending on whether the computer has had a chance to test it or not. If a system is tested and it does not pass the test, it sets the CHECK ENGINE light. If a system is tested and it does pass, then the light stays off and its readiness monitor is switched to "Ready".
When you get scanned for your emissions test, it checks to make sure all of the systems have been switched to "Ready". This prevents someone from disconnecting the battery and clearing the computer's memory and then slipping it through the test before it has a chance to turn the light back on again.
---But then again, I took my car through and failed (2 sensors 'Not Ready') for the same reasons while it was tuned. I drove it with the tune for a few hundred miles and couldn't get it to pass after 3 tries. I returned it to stock and drove a couple hundred miles and finally passed. So in two years, I will probably return my car and truck to stock well before to get an easy pass.