Hi, This is a first time to post hear, But I am new to this, I have a 89 chevy ecm #1227747 and I can not get it to program correctly? This is what I have done,I soldered the new dip socket and pluged a zf socket into that in the computer board,I can plug the original 4kb chip in and the truck will run fine, but if I copy the program on to a 27sf512 chip and plug it in with no changes to the program it runs in limp mode with the check engine light blinking. I am using a apu from moats for the programming, I have done an $od 64kb several times with no issues so I know it is something I am doing wrong. PLEASE can some one tell me where I am messing up!!! THANKS 83iroc383