Perhaps I'm thinking outta my ass again, but ya'll are talking like you can easily see the OBDII/evap codes...?
You guys all have some sort of diagnostic plugin right? There's no way to tell codes just by sitting myself down on the ground looking at the truck.. right?
I've been looking at the
AutoTap System but if there's another way to diagnose error codes etc I'd like to know about it
How about schematics/howto's on building my own OBDII serial interface?