Quote: Originally Posted by
jpuype 
It will give information that is much more accurate then the things
we have to work with (GPS distance, calculated fuel estimates, ....)
Yes. The data is very accurate (distance to 0.25m for my Tatra for example). Tyre wear or wrong pressure will probably be the major source of errors.
Quote:
Will it also be possible to keep track of the amount of fuel used, and hence being able to determine how much fuel should be left in the tank?
Absolutely, under two conditions: 1. You know the volume of your tank 2. You always fill the whole tank (which I guess most people do anyway). Personally I use Phidgets I/O board to watch the output fuel level sensor directly.
Quote:
I'm just wondering if all makes of cars are sending the information from the engine in the same way.
Good point. The signals are not the same and depend on many things. You will always have to calibrate the unit (or rather the software using its output) and in some cases (i.e. Jaguar) small change in the firmware may be needed (it sends several different pulses to the injector), but generally the EDC should be usable (the sample frequency is 6MHz, so we can deal with all types of signals I know about).