i am using a start retard module to retard my timing when spraying but since its a zex kit and uses a tps instead of a micro switch I don't know where to run the wire to retard the timing

 

tap into the wire coming from the zex box to the tps. that wire is the microswitch wire. whenever it sees the max volt(4.90-.99) from your tps wire it clicks the solenoid on, which would essentially do the same as a microswitch.