Modifying OBD-II systems

[David A. Cooley]

At 09:43 PM 5/12/99 -0400, you wrote:
>So we won't be having the open discussions about tuning the OBD-II systens
>like we do with the ALDL systems?  What do the guys with new cars do when
>they hot-rod them?  Stop participating in the program?

It's no more illegal to modify a 1999 OBD_II PCM than it is to modify a
1981 Carb ECM.
There are rampant false rumors that OBD_II monitors your every move and
that's plain and simple BS.
OBD_II can be modified, but there are security measures in the PCM... to
address the cal via the OBD_II (SAE-J1850) data link, there is a security
algorithym based on the VIN of the vehicle.  You request access, the PCM
requests a code, you send the code, then your in.
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           David Cooley N5XMT           Internet: N5XMT at bellsouth.net
     Packet: N5XMT at KQ4LO.#INT.NC.USA.NA   T.A.P.R. Member #7068
   Sponges grow in the ocean... Wonder how deep it would be if they didn't?!
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