Can a clogged fuel filter cause vapor lock?
Several factors can contribute to vapor lock: Lose of fuel delivery system pressure or flow (volume)(this may be caused by a restricted fuel filter or insufficient voltage to the fuel pump) Fuel pump next to hot operating engine. Faulty check valve in an electric fuel pump assembly. Clogged fuel return system.
Can an EFI engine vapor lock?
The longer an EFI engine runs, the higher fuel tank temperatures can become. As vapor enters the pump, it displaces liquid fuel required to lubricate the mechanism, allowing metal to touch metal, creating even more friction and heat. Once the pump begins to super heat, a complete vapor lock will develop.
What happens when you vapor lock?
It’s a uniquely modern problem. 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. It commonly occurs when a car has been idling or has been turned off and then back on.
What happens if you have a vapor lock in your fuel pump?
Result: Excess vaporization of fuel in the carburetor and/or actual vapor lock in the fuel line or fuel pump. Wrap the fuel lines on both sides of the pump with aluminum foil. Note: This is a precaution if your car is prone to vapor lock. It won’t help much once the problem has already occurred.
When does a VW do a vapor lock?
Every VW we have had has done this when it got hot. They seem to be especially touchy both when they’re hot and when it’s getting close to “Tender Loving Care” time, when timing or valves may be a bit off the numbers.
What causes a car to go into vapor lock?
Cause: The engine overheats, causing the fuel line, fuel pump and carburetor to heat up. Result: Excess vaporization of fuel in the carburetor and/or actual vapor lock in the fuel line or fuel pump. Wrap the fuel lines on both sides of the pump with aluminum foil. Note: This is a precaution if your car is prone to vapor lock.
Why does my VW engine lock when it gets hot?
So you lift the engine lid and notice right off that there is no fuel in that small fuel filter in the line between the fuel pump and the carburetor (if you have such a filter — we actually recommend that you don’t have a filter here). So right away you know the problem (right?) – vapor lock! Every VW we have had has done this when it got hot.