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Old 04-19-2008, 09:14 AM   #3
ViperTony

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Join Date: Apr 2006
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Default Re: PCM Reset & Emissions Testing

Quote:
Originally Posted by SoCal Rebell View Post
200 miles should be fine, your PCM should of "learned" by now. When reset it runs very rich to protect the motor and gradually leans out to the proper 13 to 1 or so as you drive.
What I found interesting is that my AFR is actually leaner until WOT. Before the reset, my AFR gauge read around 14.7 - 13's during normal cruising. It's now between 14.5 and 15.1. WOT pulls fall within the normal AFR range I tuned with the Vec3. I think the PCM is still learning. Last fall, Chuck Tator reset my PCM using the DRB tool which I believe reset the adaptives. Since then, I haven't driven the Viper enough for the PCM to adjust. So I think it has some learning to do and I'm happy to put on as many miles as it takes to help get it there.
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