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possibly but it would start with a bad cam sensor if you have no check engine light check the main EFI relay in the engine bay I just had the same issues and it turned out to be when my motor would get to operating temp the relay would not meet the connections a quick check is to turn your ignition key on remove the efi relay and bridge the 2 bottom relay connectors if the ecu turns on you know you have a problem with power or ground to the relay... WTB your snap on scanner would be lovely to figure out which one of my sensors are not working right im too lazy to do it the right way. Hope this helped good luck man

ECU is on the passenger side under the rug you need a 10mm socket to get to it, its under a black cover, Im currently having the same problem with mine when it does start is really rich when it doesnt start its because there is no check engine light, ive been trying to figure out if the ECU has a fail safe where if it lacks a needed signal it shuts down power to the ECU, I have no spark though when this happens, and when it does start it runs like crap but that could also be the overly rich condition... ive been trying to figure this out for almost a week and its annoying me because I cant figure out whats shutting down the ecu

these problems suck, I just bought a 92 SC400 150k miles and inherited the same problems check to see if your check engine light comes on in the run position or while your cranking if it is not find out why your ECU is not getting power thats why Im getting no spark, there are wierd fail safes on these ecu's I found one of my camshaft postion sensors to be faulty but still doesnt explain the lack of a check engine light at start up, need to find out what is cutting spark and fuel, I can jump the FPR and IGR relays and get it to start but it wont stay on, Im suspecting unless this car has some wierd problem where if the ecu doesnt get a signal it shuts it down Ill keep you updated I will be working on it until its fixed. there is alot of talk about the ecus crapping out between 150k and 200k miles, find out if it has voltage if it does chances are there is a fault in the ECU mine is most likely a ground since it randomly does it to me