Fuel in an evaporated form.
fuel vapor line is common in the car fuel line
A vapor leak in the fuel system.A vapor leak in the fuel system.
Vapor lock is a condition when liquid fuel turns to fumes in the fuel system causing it to lose pressure and cause fuel delivery problems. It is not actually a lock.
Overfilling the fuel tank with gas could be a reason.
The only byproduct of using pure hydrogen as a fuel is water, often in vapor form.
Carburated vehicles used fuel pumps that produced very low pressure. Typically the pressure on carburated vehicles was around 1/4 to 1/2 psi. The boiling point of gasoline is actually not very high and if the fuel pump is not able to maintain pressure and/or the temperature of the fuel line BEFORE the fuel pump starts to rise above the boiling point the fuel flashes to vapor and now the fuel pump is attempting to pump vapor or the fuel between the pump and the carb flashes to vapor, the condition is called "vapor lock". Fuel pumps are designed to pump liquid. Once the pump starts getting vapor instead of liquid fuel, it is unable to maintain the fuel level in the carb. Sometimes a new fuel pump can help resolve a vapor lock problem, other times it is just a matter of heat on the fuel line somewhere. An old trick was to put an electric fuel pump on a vehicle somewhere well back of the engine. Let me know how it works out.
Gasoline vaporizes in a fuel line and obstructs the flow of liquid fuel.
Large fuel vapor leak. Check for a loose gas cap or a cracked fuel vapor hose from the tank to the engine.
The vapor canister is under the vehicle, mounted next to the fuel tank.
According to the PT Cruiser service manual the vapor cannister is on the fuel tank.
An octane booster may not directly help with vapor lock, as vapor lock is often caused by high under-hood temperatures leading to fuel vaporization and air pockets forming in the fuel lines. To prevent vapor lock, it's better to address the root cause by improving engine cooling, insulating fuel lines, or using a fuel with higher resistance to vaporization.
A 1986 Ford F-350 may experience vapor lock if the fuel line is exposed to excessive heat. This allows the fuel to boil and prevents the carburetor from receiving a constant supply of fuel.