The MCZ33290EF is for ISO K line only, I am working on it, n8thegr8 works on the PWM/VPW stuff that I don't have a clue about
I received my OBD-II plug, yeah
waiting for the remaining...
BTW n8thegr8, in my code I posted on page 1, I use some function like iso_write_data() or iso_read_byte() whatever, maybe it would be good to have only one generic program that does the calculation/display/etc so we will not work on the same thing? And you can work on pwm_read_data() or pwm_write_byte() and so on.
EDIT: I updated the code on first page to my latest version. It should display instant gasoline consumption, in L/100 or US MPG. Too bad I can not test it LOL.