Working on a customers 408 LSX engine in a 80's model Camaro. Read the computer then wrote the tune. Once my tune is wrote the fuel pump only runs for half a second and WILL NOT CONNECT to scanner or to write another calibration. IVE DONE THIS ON 2 computers now and I don't know what else to try. Even tried to recover the ECU in a truck using his wiring harness like a bench harness and I can't recover anything due to it not connecting to the scanner.
Any insight, at this point Im lost, don't know what's going on.
Here is my First base tune for this setup.
payton408pulledben1.hpt