Originally Posted by
96gt4.6
Bill has it. The RTD is a stripped down version of the normal MPVI, and does not work the same.
You will need to buy a normal MPVI interface to read/alter your Camaro's Magnuson tune, as long is they did not lock the program. It all has to do with them being able to be SURE an emissions compliant tune is wrote onto the PCM and not altered before doing so.
The Whipple kit I recently did came with an actual MPVI interface, and they simply slave out the MPVI interface serial so that you cannot open the tune they send you, only write it. But, after it has been written you can re-read and tune away as you wish.
The Maggie car I did supplied me with the RTD tool you have, which pretty much leaves you with no choice but to buy an MPVI and then do as you wish.