Hello,
I have this weird problem with 1992 LS400.
Car starts fine every time in the morning or whenever it was stopped for longer periods (few hours). But sometimes, after driving a while for it to warm up to normal level, if stopped and attempted to start it again right away (in a minute or so) car would crank but engine wouldn't start. However, after waiting few minutes (4-5 minutes) it will start again just fine as always. Feels like something inside has to cool down to start again. Battery is fine, starter is fine, temperature gauge on dashboard never comes above the middle. This phenomenon however does not appear consistently because I am testing it now and then. For instance, I would park at the office parking lot when arriving in the morning, stop a car and then try to start it again. One day it would start just fine and the other would not. I leave it there, come back to drive for lunch and starts just fine as always.
I realize this could be caused by hundreds of problems but wondering perhaps somebody is or were experiencing something similar and would share it with me.
Thanks,
/M.