ECU reset due to cam sensor fault or cam sensor state invalid due to ECU reset?

[aerobod - near CYYC]

With my MBE 9A4 ECU on my R400D I was doing some logging to check general engine health and experienced a brief ‘jolt’ in the power output at medium throttle. When I looked at the data I saw a single data point with 50ms duration where the ECU reset counter incremented by one. All data otherwise looked fine, except that I had the cam sensor state as ‘invalid’ for that single data sampling interval.

Does anyone know whether the ECU reset is most likely caused by a problem with the cam sensor, or whether the cam sensor value would be invalid due to the ECU resetting due to another issue?

[ChrisC]

No expert but looking at this link it seems the ECU reset is likely to be the cause of the cam sensor fault.

http://www.sbdev.co.uk/FAQs/General_running.html