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  1. February 4th, 2021 #1
    Nick Fly
    Nick Fly is offline
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    Mar 2020
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    Default Checksum Fail Fix

    Is there still a checksum fail fix on V8 for LBZ E35A ECU's? I've used B9999 Checksum Fail Fix 2 on my E38 ECU awhile back but that was with V7.5. I had to use it on my E38 because I pulled the tune off my truck and it had a diablo tune on it. Truck was no start till I used B9999. I worked with Ross back then to get it figured out and I was able to fix the tune with the Checksum Fail Fix. I pulled a tune off my 06 LBZ yesterday for the first time, thinking it was still a stock tune... it wasn't. Now I have the same issue with my LBZ. I'm not seeing B9999 anymore. Is there still a fix for this? I attached the tune.
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