What causes a fuel line to become a vapor lock?
What causes a fuel line to become a vapor lock?
The fuel in the line near the engine does not move and can thus heat up sufficiently to form a vapor lock. The problem is more likely in hot weather or high altitude in either case. Gravity feed fuel systems are not immune to vapor lock.
When does vapor lock occur in a car?
The result is fuel starvation causing the engine to run rough or completely stall. Vapor lock typically happens during summer months when high ambient temps, combined with the heat of a vehicle’s engine and exhaust, is transferred to the fuel lines. The solution? Protect your fuel lines from getting hot.
When does vapor lock occur in a gravity feed system?
The problem is more likely in hot weather or high altitude in either case. Gravity feed fuel systems are not immune to vapor lock. Much of the foregoing applies equally to a gravity feed system; if vapor forms in the fuel line, its lower density reduces the pressure developed by the weight of the fuel.
Is it possible for ethanol to form a vapor lock?
With petroleum refineries adding more and more Ethanol to Gasoline, and as longer and longer periods of hit weather are experienced worldwide, testing fuels for the risk of forming a Vapor Lock is of renewed interest. Many older engines simply have not been built to be prepared to match modern fuels.
What can I use to prevent vapor lock on fuel lines?
For carb-equipped vehicles, one of the easiest solutions to preventing vapor lock is to use a thermal-barrier sleeve on the lines such as a Thermaflect Sleeve from Heatshield Products. Our heat shield sleeves have a built-in, high-temp hook-and-loop fastener system which prevents needing to remove fuel lines and makes installation a breeze.
When does a fuel pump go into vapor lock?
Vapor lock happens when the temperature of fuel gets high enough to transform liquid into a vapor state. Fuel pumps are designed to pump liquid, not air, and the increased pressure inside the fuel lines keeps the fuel pump from being able to keep the fuel moving.
What does vapor lock do to an engine?
Vapor lock happens when your fuel boils in your carburetor or your fuel line. Vaporized fuel creates back pressure in your fuel system and prevents gas from getting to your engine.
With petroleum refineries adding more and more Ethanol to Gasoline, and as longer and longer periods of hit weather are experienced worldwide, testing fuels for the risk of forming a Vapor Lock is of renewed interest. Many older engines simply have not been built to be prepared to match modern fuels.
