I've recently got an OBD scanner and have found some of the live data streams to be very useful, I was monitoring the timing advance value and observed it fluctuating at idle by 10 deg or so the range was around (10-20) deg. I then wanted to know what was typical, what should the mean value be at idle, what should the range be etc. but I can't seem to find any information regarding what these numbers should be for any sensor, I would have thought manufacturers have a spec sheet with all these numbers so they can diagnose and fault find.
- Where would I find this information if it is available?
- If this isn't easily obtained, how are we supposed to know the values are ok?
I have a Peugeot 308 (07-12 reg)