My 940 SE stalled the other day when I was driving. The tach dropped to 0, and but none of the indicator lamps came on. I turned the key off and back on, while still coasting, but the engine would only turn over. The indicator lamps came on after I switched the key off and back on. The engine still won't do anything but turn over. I checked for spark coming out of the coil, and got nothing. I replaced the coil and the power stage, and still have no spark. I think my next step is to replace the ECU, right? I did the diagnostic test that should activate the injectors, cold start, idle air valve,... The only thing that came on is the idle air valve(I think that's the name, its the thing about 6 inches below the throttle body). I tried some testing that was in the CHiltons manual, but I don't think that the manual is right for my car, even though it says its for 200, 700, & 900 series. The ECU connector references don't match up for most of the tests. I just wanted to get someone elses opinion before I go looking for an ECU.