I have a 79 c20,that put GM TBI on and got it running. I am having trouble changing VE 1 table, i got it to change once and it was too lean, when i tried to change a little the other way, it didn't change. i have done this on another car. Not sure what i am doing wrong. I downloaded the latest ver. of Tunerpro RT. still no change. Could use some ideas/ help??? I am using AKAJ bin for 87 5.7 rv .