Has any one pulled the tach signal out of an Chevy LS engine? The manual says to combine the Engine speed with Ignition voltage. They recommend a 5000 ohm pull up resistor at the igniton wire before merging, it says this is a 15A signal. It also say the engine speed (TACH out) signal is low voltage square wave.
Question how many watt resistopr do i need? I don't think i have all the infor and have called 2 chevy service departments. Has anyone doen this so i don't have to re-create the wheel?
Question how many watt resistopr do i need? I don't think i have all the infor and have called 2 chevy service departments. Has anyone doen this so i don't have to re-create the wheel?