I've been looking into different instrumentation options. Recently, I've come across the OBDWiz software (see website here:
ScanTool.net LLC - OBDwiz Automotive Diagnostic Software). You can get the scan tool and the software for $30 on Amazon.
I'm thinking this may be a good option for me to use with an old laptop that I have lying around. One thing I really like is that you can save log files. That way I can analyze things to death
One thing that I don't know is whether there'a any limit to how many parameters you can log or how long you can log for.
Is anybody using this or other PC-based instrumentation?