Chevrolet Repair: electicral, oil pressure switch, necessary pressure

Question
will start and run when cold
when you drive it fine.
when i turn it off will not start again
until it is cold again.
have replaced coil,plugs,wires,pick up coil,cap,rotor,fuel pump,filters and control modual

Answer
Hello James,
Temperature sensor?
Just a guess.

Check to see if the fuel pump in the tank is running when you turn the key to run.
It is operated by a relay, but there is a backup system to operate the pump in case of relay failure, and that is an oil pressure switch.
It could be that your relay is bad, and you are depending on the oil pressure switch completely.
Your oil is thicker when cool, and may build to the necessary pressure when cold, but not get there when hot.
But check for the pump running first. If it runs for three seconds or so, even when the car won't start, then you need to check for spark from a plug wire.

Van