Hmmm - replacing the whole dizzy sounds sus all right. I've heard that if replacing the module it's also fairly normal to also replace the pickup gizmo inside the dizzy (hall effect device?) - but the whole dizzy....???
As far as setting the timing, all I can think of is that if they haven't basically screwed something in the location of the dizzy then maybe they're not properly grounding the STI pin?
Geez, I hope it's not that the ECU is fried!
- another thought is that they might be trying to fit a dizzy off an EFI XF or something? - the module will certainly look superficially the same (don't know about the rest of the dizzy) but they're definitely not compatible.
- something else too - I've got an EL ECU in my ED and I've found that the Self Test Mode can be a bit picky in when it comes in properly - ie. when I tried to get it to go into self test with the timing too far advanced it just didn't want to know - but as the timing got closer to the proper 4 degree point it behaved properly - ie. there was the correct increase then drop off in revs (which it simply didn't want to do with the timing up past ten degrees or so).
IT'LL GO OR IT'LL BLOW!!!