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Got this from a Supra site:
Oh boy... Okay unless you know where you got the ECU, you're pretty much screwed unless you take it apart. Here is why.
Blitz sells the ecu to Access. Blitz does NOT tune them themselves. Access does not do ANY tuning in the USA!
According to Blitz the only way you can find information about your ROM is to contact Access in the specific region the ECU was tuned. Then Access can tell you what was done to the ECU. Keep in mind most Access tuning is done in Japan. So you will need to speek Japanese.
HOLY HEADACHE!!!!!
Go with the AEM, its what ive got.
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