more comm info, not a lot of folks use/need it, but if you are interested:
for usb connections: FT232RL based (needs drivers for windows)
SparkFun Electronics - FTDI Basic Breakout - 5V $14
for rs232 serial port:
SparkFun Electronics - RS232 Shifter Board Kit $7
The TX pin is hard to get to, what I did to avoid soldering on the IC was to hammer a small piece of solid copper wire flat and slide/jam it in the socket along with the tx pin.
but ground and 5v should be easy enough to tap with a blob of solder. You probably don't want to connect to 5v with the usb adapter in the car.
Every 1/2 second it sends:
//send out instantmpg * 1000, instantmph * 1000, the injector/vss raw data
simpletx(format(instantmpg()));
simpletx(",");
simpletx(format(instantmph()));
simpletx(",");
simpletx(format(instant.injHius*1000));
simpletx(",");
simpletx(format(instant.injPulses*1000));
simpletx(",");
simpletx(format(instant.vssPulses*1000));
simpletx("\n");