james i do not know if this will help as i do not have a log of it.
I went to get in the car this morning to start it, but did not, however i left the ignition on, was for some time also.
about 15-20 mins later i went to start it, but it did not catch right away, (regulator dos not hold fuel pressure) i could keep cranking and it would start, but when it happens i just switch off and the back on and i am good. Now this hole time i had the laptop on. not data logging, just on
i use a histogram for the knock level.
when i did the fast switch and on i looked across to the laptop to see the knock was normal, or normal for my car. however before the switch off to restart, the histogram showed a straight line, not at zero where you would expect, but it was at 20%, no ripple as the engine was not running, but it was there. i will try and duplicate this tomorrow morning again.
but i figure i should mention this to you.. have no idea if it would give you somewhere to look or not..