Hi I am planning on buying a TTL (0v-5v) to Serial converter and wiring it up to my chipped obd1 p06 so I can data log with crome pro. Because I am making my own cable and using a regular old TTL to serial converter and not a hulog, I need to know what the pitch -space between cn2 port pins- are, so that I buy the right connector and header pins. Anyone know the pitch pins, or distance of the holes?

the hulog is like $35. why even bother trying to make one?

Mostly cause I like to make stuff! I found a pre-built solution for a TTL to serial converter only costs $4. I just bought some pins for it, still waiting for the usb cable (with converted built it) to show up. I bought some pins from moates, so I can measure them, then get more in bulk for a better price. I will measure the pins with my dial calipers later today, incase anyone else wants to know the pitch/distance between the pins.

you said you have a chipped p06. I think the easiest way to answer your question would be to take the measurements on your own ecu...

Yeah It seems to be a 2.54mm pin in case anyone wants to know!

Here is the link to what I am using in case anyone wants to try it out.

PL2303HX USB to TTL RS232 COM UART Module Serial Cable Adapter for Arduino | eBay