Out with the old and in with the new. When installing the Haltech E6K and the TCI Transmission controller back 2005 I kept the stock engine harness in place and made an adapter for the Haltech. Some signals like TPS were spliced to the TCI box also. Some wires like injectors and triggers had to be wired new all the way. I had a WB lambda controller in there under the dash. I alde made a bord with a one chip computer (PIC) to change speedo signal frequency from transmission controller to match the stock dash. When tuning both systems had a slow serial interface. It took minutes for the old DOS based laptop software to start and synchronize with Haltech.
I decided that it was time install a modern engine control system that could do everything. I removed all old wireing and reused the firewall rubber boot for the new wireing.
