Throttle Position Sensor (Optional)
Wire Colours: Red/Blue, White/Black and Yellow/Green
Most modern engines have a throttle position sensor fitted. The sensor works by varying the voltage on the signal wire according to its angle of rotation. Most TPSs have three connections. One connection requires a constant voltage applied, the other is the varying voltage output of the TPS and the last is connected to ground. The EMS STINGER 4 ECUs can supply a regulated 5 volts via the orange wire. The blue/pink wire must be connected to the signal output of the TPS, this will be the varying voltage and the black wire is used to ground the TPS.
Please note that the EMS STINGER 4 ECU can read the TPS while it is still connected to the OEM ECU. In this case there is no need to connect the orange or black wires, only connect the blue/pink wire.
Note: If you are not using the orange power wire then you must ensure that it is insulated to prevent short-circuiting.
Before you can use the TPS it must be spanned so that the ECU can determine the closed and open throttle positions and all positions between. This is done using the STINGER 4 management software.
Throttle position sensors are one of the most unreliable sensors on an engine. This is because of their mechanical nature. They are vulnerable to water, mud, dust and other contaminants that get inside the TPS mechanism. In order to increase reliability EMS have made this an optional sensor. Providing that the engine is tuned with MAP as the main load source, if the TPS stops working the ECU will still continue to operate.
Stinger 4 instruction manual version 2.0