Hi Phil -
1992 - 240 sedan
Having read the 100+ messages in this thread - (and counting!) I have the exact same situation that OP has except that I know I have a 2 working fuel pumps. My engine crapped out on me* and failed to start and I discovered that my coolant temperature sensor was disconected (after paying $30 for a new one) Installed the new one anyway, but a no start still. Based upon what you said about what gets the injectors going, I am betting the farm that disconnecting/reconnecting the ECU is gunna work. (I have already disconnected the neg terminal from my battery hoping it would clear, but something tells me there is some kind of 'residual memory' in the ECU. A guess.)
If this does not work, I will try the ether and then mess with the AMM.
*it felt like it was really trying to hold on to life, but after one big cough, died. I think I kind of felt that emotionally, like 'I killed it' lol
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