Verify choke is working proper. Every FJ engine I've had, carb linkage was all fouled up. Recommend downloading your engine manual and reading it.
Could be's
1.valve adjustment
2.Clogged fuel tank.
3.Failed fuel lines.
4.Dirty carb, pilot circuit.
5.Clogged tank filter slash screen at tank bottom.
6.Dirty plug.
7.Tired air filter. Old cellulose and dirt sandwich.