My ford tempo wont start when hot,no power

crankshaft sending unit creates these issues. if check engine light
is activated during these issues

colent system not full. when air gets to sensor it wont regester

After the car has been driven until warm,say 10 minutes,leave it
running and feel the hoses going thru the firewall to the heater,
there are 2 ,if they are both cold it needs a thermostat.
If one is hot and one is alot colder , it's the heater core.
If they are both hot it's a door on the inside.
Thermostat on the 2.3 (assuming) is at the engine end of the top
radiator hose,front of the head. Easy one

If you mean that it starts fine when cold, but if you stop & turn off the engine (to to pop into a shop for example) then try to restart and get absolutely no turning over, then you need to replace your battery. It has a short or crack which is expanding when hot creating your problem.

Could be the fuel pump, but if the Timeing belt/chane has never been replaced then it most likley jumped time or the belt broke

It sounds like you have brought a lemon as if it hard to start when cold then its lacking compression which is worn engine piston rings and valve guides,and if it starts smoking when driving and if its BLUE smoke then its bad piston rings And if its BLACK smoke then its to much petrol getting into the engine which will also cause the engine to wear out quick as its washing the bores with fuel instead of oil,and that will also stop the engine from starting when hot,
SO if its BLUE smoke replace the engine
If BLACK smoke repair fuel fault.
Ron

I had the same problem with f-150. the timing chain would stretch when it heated up and cause it to quit and naturally it wouldnt start until the chain cooled down and tightened back up.

try checking the trans fluid level if its not that check connection on trans control module located under carpet on passenger side floor behind a panel same location as engine control module

try starting fluid next time if it start then you have a fuel problem your not getting enough fuel weak fuel pump try a tun up first when you do tun up change your fuel filter also.

sounds like you need a starter