When I get stuck in traffic in real hot weather I get a vapor lock and I just run out of fuel to the carburetor. The engine will restart if you prime the carburetor 1985 Chevrolet C 3500

There could be several reasons why your Corsa Lite is refusing to start when the weather is hot. Here are some possible causes:

1. Weak battery: High temperatures can cause the battery to lose its charge quickly, and if the battery is already weak, it may not be able to provide enough power to start the engine.
2. Faulty starter motor: If the starter motor is faulty, it may struggle to turn the engine over, especially when the engine is hot.
3. Clogged fuel filter: A clogged fuel filter can prevent fuel from reaching the engine, which can cause starting problems.
4. Vapor lock: In hot weather, the fuel in the fuel lines can vaporize, causing a vapor lock, which can prevent fuel from reaching the engine.
5. Ignition problems: If the ignition system is not functioning properly, the engine may not start, especially in hot weather.

To determine the exact cause of the problem, you may want to take your car to a qualified mechanic who can run a diagnostic test and identify the issue. They can then make the necessary repairs to get your car up and running again.

If it is a gas engine, its almost impossible to get vapor lock.
Vapor lock is when liquid gasoline turns to a vapor which will not flow thru a carburetor. The usual cause was hot fuel lines going to the carb.
Since the early 1980s engines have used fuel injection which uses liquid fuel under pressure.

Check the fuel pump pressure. IF this is heat related, it could also be a bad gasket causing a vacuum leak. The other thing could be the fuel line is getting too hot causing the gasoline to create a vapor lock.

Hot starting problems are usually fuel related. When a hot engine is shut off, the temperature of the engine and everything on it continues to rise for awhile as the engine undergoes a period of "heat soak." This can cause fuel to boil inside the carburetor bowl, fuel lines and fuel filter. When you attempt to restart the engine, "vapor lock" obstructs the flow of fuel and the engine doesn't want to start.
This is much less of a problem on fuel injected engines because the fuel is usually under much higher pressure inside the injectors and fuel line. Even so, a fuel line routed near an exhaust manifold or a fuel rail that's exposed to a lot of heat may still suffer the same kind of problems.
Heat soak problems such as these can sometimes be cured by wrapping insulation around affected fuel lines, and/or installing an insulating spacer or heat shield under the carburetor.
A Seasonal Problem Hard hard starting tends to be a seasonal problem, but may be worse in the early months of spring when refiners are switching fuel blends. Gasoline refiners produce fuel with a slightly lower volatility rating (called "Reed vapor pressure") during hot summer months because lower volatility fuel is less likely to boil and cause hot starting problems. During the winter, they switch to a higher volatility fuel because it makes cold starting easier. But if you still have "winter" grade fuel in your tank when warm spring weather arrives, you may experience some hot starting problems. The problem will go away, however, as soon as the refiners in your area switch to their summer grade fuel.
Other Causes Hot starting problems can also be caused by cooling problems that allow your engine to run too hot (the pistons swell up and may scuff the cylinder walls), or excessive resistance in the starter motor that causes the engine to crank slowly. A starter "amp draw" test can be used to check the condition of your starter. Also, many starters have small "heat shields" to protect them from heat radiating from nearby exhaust pipes or manifolds. If the shield is missing, the starter may get too hot and bind up.

it sound to me like your temperature blend door actuator is bad

You can not have vapor lock on a fuel injected vehicle

The fuel either returns continually to the fuel tank
or is moving & sprayed thru the fuel injectors

Explain what the real issues are & what has been
done to correct

Hot starting problems are usually fuel related. When a hot engine is shut off, the temperature of the engine and everything on it continues to rise for awhile as the engine undergoes a period of "heat soak." This can cause fuel to boil inside the carburetor bowl, fuel lines and fuel filter. When you attempt to restart the engine, "vapor lock" obstructs the flow of fuel and the engine doesn't want to start.
This is much less of a problem on fuel injected engines because the fuel is usually under much higher pressure inside the injectors and fuel line. Even so, a fuel line routed near an exhaust manifold or a fuel rail that's exposed to a lot of heat may still suffer the same kind of problems.
Heat soak problems such as these can sometimes be cured by wrapping insulation around affected fuel lines, and/or installing an insulating spacer or heat shield under the carburetor.
A Seasonal Problem
Hard hard starting tends to be a seasonal problem, but may be worse in the early months of spring when refiners are switching fuel blends. Gasoline refiners produce fuel with a slightly lower volatility rating (called "Reed vapor pressure") during hot summer months because lower volatility fuel is less likely to boil and cause hot starting problems. During the winter, they switch to a higher volatility fuel because it makes cold starting easier. But if you still have "winter" grade fuel in your tank when warm spring weather arrives, you may experience some hot starting problems. The problem will go away, however, as soon as the refiners in your area switch to their summer grade fuel

Hot starting problems are usually fuel related. When a hot engine is shut off, the temperature of the engine and everything on it continues to rise for awhile as the engine undergoes a period of "heat soak." This can cause fuel to boil inside the carburetor bowl, fuel lines and fuel filter. When you attempt to restart the engine, "vapor lock" obstructs the flow of fuel and the engine doesn't want to start.

This is much less of a problem on fuel injected engines because the fuel is usually under much higher pressure inside the injectors and fuel line. Even so, a fuel line routed near an exhaust manifold or a fuel rail that's exposed to a lot of heat may still suffer the same kind of problems.

Heat soak problems such as these can sometimes be cured by wrapping insulation around affected fuel lines, and/or installing an insulating spacer or heat shield under the carburetor.
A Seasonal Problem

Hard hard starting tends to be a seasonal problem, but may be worse in the early months of spring when refiners are switching fuel blends. Gasoline refiners produce fuel with a slightly lower volatility rating (called "Reed vapor pressure") during hot summer months because lower volatility fuel is less likely to boil and cause hot starting problems. During the winter, they switch to a higher volatility fuel because it makes cold starting easier. But if you still have "winter" grade fuel in your tank when warm spring weather arrives, you may experience some hot starting problems. The problem will go away, however, as soon as the refiners in your area switch to their summer grade fuel.

Hello, why type of fuel do you use? You could have water in your fuel??. If you are living where the weather is very hot and your having to buy fuel with alcohol 10% or more don't buy this type of fuel. Your 1988 Ford Bronco II is carburetored, and the alcohol will start boiling causing vapor locking this Ford Bronco II. One reason is that early model used an open fuel system and none injectors. With the alcohol additive will low the boiling point of the fuel causing it to boil away; therefore, carburetor can't operate on fuel vapors it has to be liquid. GB...stewbison

Replaced Fuel Pressure Regulator. So Far SO Good