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- Thu Oct 26, 2017 7:29 pm
- Forum: General Motors
- Topic: MEFI4b Computer
- Replies: 1
- Views: 5044
MEFI4b Computer
I bought Mefiburn scan and tune software. I got it all working and communicating. I found Chevy performance locked the tune in the mefi 4b controller i have. It looks like i will need mefi-4b10.xdf where can i get this file. I tried going to the obddiagnostics website and cant find this file. also i...