ECU resetting 200q20v digest

[SuffolkD at aol.com]

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I got this e-mail digest which had this info below:
Would this work for diagnostic(s)?
Independent from stored fault codes?
A bad idea?
-Scott in Boston
**Quick & Easy Way to Reset Your Car's ECM/ECU - Thanks to Kevin H. (from
his own experience)**
So...you just got your new high performance exhaust system, intake or
whatever.  Now you want immediate results, right?  Okay, it's now time to
reset your ECM/ECU for optimum performance. The good news - this will only
take about two or three minutes!

Step 1: Turn your key to the accessory (ACC) position.
Step 2: Disconnect your battery's positive, yes I said positive, terminal
cable.
Step 3: Wait 30 seconds. Now tap the terminal cable to the positive battery
post three times.
Step 4: Reconnect terminal cable.

That's it!  You've now reset your computer.  Now, wasn't that simple? You
might also want to refer to the tech tip, ECU Resets When Adding
Performance Parts, in the April edition of Import Auto News at
http://www.autohausaz.com/html/import-auto-news-april02.html#ECUResets