Hi all,
Fixed at last!It turns out that I was correct in my first diagnosis, the ECU was faulty. Unfortunately BBA have had a bit of a nightmare repairing my unit (I'm sure this car is jinxed). They went to the trouble of sourcing another complete assembly, checked it and then sent Shaun (their test engineer) to meet me at my customer's garage with that and the original repaired (again) unit.
Both the units failed to work (different faults) and I was beginning to think I had missed something on the car that was eating the ECUs. After further testing we ended up at the same conclusion that the ECU was the problem.
Shaun spoke to Chris Swan and (how about this for customer service) he offered to pay for a new ECU from the dealer.
Ordered new ECU yesterday morning and it arrived today. Shaun met me back at the garage this afternoon where the unit was fitted, although Shaun passed the responsibility of plugging it in and connecting the battery on to me. No b*ll*cks, these Americans.
My customer has eventually seen the car go out their door, their customer's car is fixed but I could only charge less than half the time spent on this job. I sometimes think the satifaction of the completion of jobs like this just isn't as good as hard cash.
Anyway many thanks to Shaun and Chris for their efforts. (Shaun travelled twice from Gillingham in Kent to Banstead in Surrey and home to north London).
Chris, if your company has no way of testing these ECUs on the bench (I realise you're working on this) then you really shouldn't be offering to repair them until you can.
That said, BBA 10 out of 10 for effort. Note to self - make posts much shorter!
Regards,
Ian.