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Home > Forum > EFI Tuning Fundamentals > Revert to previous Tune

Revert to previous Tune

EFI Tuning Fundamentals

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ag3

Aulton Greene

Gold Member

1 Post

USA

I had to update my GEN 3 ECM because i was trying to set up a 3 bar Map. The car will not start due to the Beta upgrade. How do i install my old 1 bar S.D. tune?

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