With my engine running, my SECS monitor shows around 12.7V. I've confirmed this with a meter. Is this sufficient for the ECU, or should I have more (I gather that the ECU voltage has an effect on the fuelling).

I should also add that the voltage at the battery is 'only' 13.2-13.3V.

The voltage between the alternator casing and the output wire is a tad over 14V. Between the battery earth and the alternator output is the same, so I guess the earth is all good

Am I right in thinking that the only things that can cause this is bad wiring between the alternator and battery +ve, or the vehicle systems drain?

Am I making work for myself, or am I likely to have some kind of problem?

Any pointers would be ace!

Neil.