So it was the ECU all along. Oh well, hopefully it will run forever now and you won't get any more mystery problems to solve on it. Sounds like you might have spent more time on it than the whole vehicle was worth 
Just curious, if you got another similar problem vehicle, how would you go about diagnosing this time around (assuming you didn't have a replacement ECU readily available) ?

Just curious, if you got another similar problem vehicle, how would you go about diagnosing this time around (assuming you didn't have a replacement ECU readily available) ?
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