green68mustang_2002
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Correction - they don't change the ECU - it is LOCKED.
They change the BCM and other modules (radio, etc.).
To change the ECU itself - you will have to get yours UNLOCKED - or purchase an unlocked one and swap it in (i'd do the latter, the second the stealership sees an unlocked ECU, they have an excuse to play warranty-voiding games).
The Pulsar (and the like) are "piggyback tuners" - they go INLINE WITH the ECU and modify data coming and going to kind of "fake out" the ECU. They can also be removed and leave no evidence of tampering.
Rick
So if i do decide to purchase the Diablosport intune, i would need the security gateway module bypass if i didnt purchase the unlocked ecm?