How to Install a Haltech
Although this section is about how to install a Haltech F9 onto a Mazda 13B Turbo, the same goes for any engine.
Mount the Sensors
Map Sensor : The Map Sensor should be located in the engine bay away from any direct heat , and it should also be mounted higher than the injector locations so as to not have any fuel run down the vacuum line and kill the sensor. The vacuum line should be connected to a constant vacuum source such as the inlet plenum , or a place where it gets a vacuum signal from all rotors or cylinders. On the picture below you can see a good place to run the line from on a 13B Turbo engine.

  On the outside of the inlet manifold.

Coolant Temperature Sensor : The Coolant Sensor is a bit tougher to install. You may need to drill and tap a hole to screw it into. It should be located before the thermostat , but in the housing for it. If you mount it the wrong side the actual engine water temperature will be different to that of which the sensor is reading. The picture below shows where to mount it on a 13B Turbo , but a similar place should be used for all engines.

  Mounted below the thermostat

Air Temperature Sensor : The Air Temperature Sensor should be located in the air stream of the inlet manifold , but away from any ambient heat that will disrupt the readings. If you are running a turbo engine then it should be mounted after the intercooler. The next picture below shows the correct locating point for a 13B Turbo engine.

Throttle Position Sensor :  (Or TPS). This is a tricky one , as you will no doubt have to make a bracket to hold the TPS body still. The throttle shaft may also have to be modified to properly interface with the sensor. The inner section of the TPS should rotate with the throttle shaft , and this should happen the instant the throttle shaft is rotated. There should be absolutely no play in the shaft to sensor movement. If there is you will never eliminate slight stumbles when you drive and first touch the throttle. Any movement with the throttle should coincide with moevement of the sensor. Do now worry about zero-ing the sensor yet , as this is done in the programming software. But be sure that the sensor does not inhibit the throttle shaft movement or it may jam the throttle open. Also be sure to mount it to the primary throttle and not a secodary throttle. See the picture below of the TPS on a 13B Turbo ( you sick of the 13B Turbo pics yet :-).

Wiring
Wiring the rest of the system is easy , and I will cover it shortly.  All that is basically needed is to follow the instuctions in the manual. The only slightly confusing point for most people is the wiring of the fuel pump relay. In fact it is already wired and relayed. The two orange wires that you have to connect are very simple to do. One of them ( any one ) goes to the battery +ve terminal as it must have constant 12V , and the other orange wire goes to you fuel pump +ve. The other terminal on your fuel pump goes to earth.