Originally Posted by Cheetah
Just how many wires are on the back of that unit? Did you use a hole saw for the install? Kudos on the clean install.
No hole saw required, just a dremel. The unit has two wiring harnesses. One harness is for the OBD II connector and the other one has three wires, one for the power and two .5v wires for things like A/F and other optional readings if you deisre to hook them up. The gauges reads two parameters at once and reads:
Intake Air Temperature
Mass Air Flow Sensor Frequency
Mass Air Flow Sensor (lb/min.)
Engine Coolant Temperature
Injector Pulse Width (bank 1 and 2 if supported)
Long Term Fuel Trim (bank 1 and 2 if supported)
Short Term Fuel Trim (bank 1 and 2 if supported)
O2 Sensor Voltage (bank 1 and 2 if supported)
Manifold Pressure in PSI (Boost pressure for factory
Engine Run Time
Idle air Control Counts
Throttle Position Percentage
Throttle Position Voltage
Oil pressure (some 8 cylinder engines)
Fuel economy (MPG)
The newer 1.4 firware version gauge that I got also has shift lights, which I don't need.
The installation directions are here.
PontiacDad did a great write up. I followed his instructions to a T, and It took me about 20 minutes to put in.