what is VATS

[Ken Kelly]

VATS = Vehicle Anti Theft System. It is GM's system that
requires the Key to have a resistive pellet in it. There are
15 different values for the pellet, so now you need a
special key that is coded both to match the tumblers and
match the Resistor. Shoving a big bar in the lock to break
the cylinder, or shorting out the ignition switch will not
start the car, because it doesn't provide the right
resistance. 

	If the resistance is wrong the fuel pump is not enabled.

		Ken

Pat Ford wrote:
> 
> Previously, you (Andrew Mattei) wrote:
> { Ken Kelly wrote:
> { >
> { >         I do have an 8051 that I took from a 95 Black and white, I
> { > can verify that the VAT is enabled in this PCM if you want.
> {
> { Just as another data point, my spare 16188051 PCM came from a 4.6L '94
> { L99 Caprice, and it has the VATS bit set to "Enabled". I know nothing
> { else about the car - only interested in the PCM - don't know if it
> { actually had VATS or just this mystery knocker box. Its fuel/timing/etc.
> { maps were *very* different than those of the aluminum headed 5.7L LT1
> { cousin motor. Kind of a neat thing to see how different they were. :)
> { Surprisingly, though, my motor did start with that tuning... (when I
> { tested the PCM at the junkyard). If I'd known how different they were
> { tuned, though, I might not have tried. ;)
> {
> { -Andrew
> 
> --
> Pat Ford                           email: pford at qnx.com
> QNX Software Systems, Ltd.           WWW: http://www.qnx.com
> (613) 591-0931      (voice)         mail: 175 Terence Matthews
> (613) 591-3579      (fax)                 Kanata, Ontario, Canada K2M 1W8