My 1995 LS400 takes like 5secs to start, sometimes less. If I try to start and it don't start, the next time it starts much faster.
I also have no power usally when I'm starting from stop. The car vertually can't move, but I have more power if I don't press the gas down very much.
It seems to want to stall on a quick hit of gas. It like when the engine normally generate a high vacume, opening the trottal screws it up.
Anyway I have new Spark plugs, distributor, timing belt, water pump, termostate, and I checked to hear all the injectors clicking away. I also used good stuff for cleaning the throtal body, injector clearn in the gas, along with cleaner that is sucked up by vacume to clean all the engine.