It depends, we had a customer who had a intermittent misfire after 40 minutes of driving and agreed for us to keep her car for a week and for our workshop controller to take it home every night and datalog it. 4th night it misfired and we found the fix. we gave her a courtesy to keep her mobile and fuelled her car to the top
so the answer is yes to a tech taking it home but yo have to be able to trust the tech to do it. normally only a diagnostic tech or workshop controller would do it.
Alex
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