[thompstl1]

Here are a couple of observations related to disconnecting the battery terminal;
At the Texas Mile my A10 was shifting from 3rd-4th gear badly. It would hit the rev limiter in 3rd, hesitate for a second, then go to 4th. The rest of the shifts were ok. I was consistently in the 169-mph range vs other stock ZL1’s in the 173 range.

I met a professional tuner there (on the last day) who suggested I disconnect the battery terminal for 10 minutes to erase all the transmissions “learned” behavior. I did that, but while putting the terminal back on I didn’t make an immediate good connection and it sparked a few times. Check engine light stayed on for the next hour or so. Then I disconnected the battery again and this time when connecting it I made an immediate good connection until I could get the hold down bolt tightened.

On my next run, the transmission shifted perfectly and I ran my best time of 173.9 mph.

All that said has drawn me to a couple of conclusions. When I disconnect the battery in the future, I’ll reconnect it quickly and not let the cable spark as I put it down over the post. Also, I’ll always probably disconnect the battery in the future prior to a run to erase any learned/bad behavior.

Thought I’d share this experience, hope it’s helpful in some way to you guys.

[Boo]

Originally Posted by thompstl1

Here are a couple of observations related to disconnecting the battery terminal;
At the Texas Mile my A10 was shifting from 3rd-4th gear badly. It would hit the rev limiter in 3rd, hesitate for a second, then go to 4th. The rest of the shifts were ok. I was consistently in the 169-mph range vs other stock ZL1’s in the 173 range.

I met a professional tuner there (on the last day) who suggested I disconnect the battery terminal for 10 minutes to erase all the transmissions “learned” behavior. I did that, but while putting the terminal back on I didn’t make an immediate good connection and it sparked a few times. Check engine light stayed on for the next hour or so. Then I disconnected the battery again and this time when connecting it I made an immediate good connection until I could get the hold down bolt tightened.

On my next run, the transmission shifted perfectly and I ran my best time of 173.9 mph.

All that said has drawn me to a couple of conclusions. When I disconnect the battery in the future, I’ll reconnect it quickly and not let the cable spark as I put it down over the post. Also, I’ll always probably disconnect the battery in the future prior to a run to erase any learned/bad behavior.

Thought I’d share this experience, hope it’s helpful in some way to you guys.

After i put the CAI back on and reconnected the battery cable...and i had it off for about 10 mins as i was fixing some things with the CAI...i went for a drive. The car felt like it was shifting more aggressively. When i put it in track and really got on it for awhile I was really impressed with the performance shifting...it seemed to hold the gears longer and at a higher rpm. I wasnt sure if it was a figment of my imagination or what. Perhaps it is as you said...the learned trans has reset. Great info for all! Thank you

[jbp8653]

For what ever it's worth. When we installed Roto-Fab we unplugged the MAF. When we started car up it threw a code relating to the MAF. Cleared the code and all was well. If you disconnect the battery I don't think this will happen. Just keeps you from having to clear codes I think

[ZED SLED]

Per the Rotofab install video, I left my MAF plugged in when i removed it. No issues.