Fuel Tank Cap Vent Is Clogged

A blocked vent pipe to the car s gas tank can be a real problem.

Fuel tank cap vent is clogged.

In this video i show you an easy way to check if your fuel cap is venting properly. When this line is. The vent hose had been shoved down creating a sag or belly and causing fuel to become trapped in the line which blocked the tank s ability to vent. Most people are not even aware such a problem can occur or what it might lead to.

Step 1 switch the stihl chainsaw s master control lever into the stop position and set the saw on a flat workbench. This stops the flow of fuel to the carburetor causing the engine to stall. Once you get to these hoses remove the vent hose which is most commonly a 5 8 vent hose. The tank vent cap needs to be cleaned occasionally for the carburetor to work properly.

Gasoline expands in volume as it warms up and shrinks in volume as it cools down. Able to enter the tank and a vacuum or vapor lock will occur. Is the fuel tank vent clogged at the fuel tank fitting. As fuel is consumed by the engine the level in the fuel tank lowers.

Modern vehicles have a vent hose that is part of the fuel system. In order to breathe your tank must have a vent somewhere that will relieve both vacuum and pressure. Unhook or unscrew the carburetor box cover on top. If your motor runs for a few moment and then dies but starts back up this tip may be for you.

Not only can this boat fuel tank vent cause issues when filling up but it can also starve the engine of fuel and leave you stranded. The tank vent cap sits on top of the fuel tank and allows these heated gasses to escape. A car s fuel tank is much more than a tank with a fuel hose leading to it. What happens when a tank vent gets clogged on a w123.

If the fuel cap vent is clogged air won t be. The fuel level of your tank changes throughout the day even if you are not driving it. With the hose off blow on the other end and see if air comes out. For anyone that doesn t think the lift pump on a om617 can practically suck a golf ball through a garden hose here are two pictures of my fuel tank when the vent became fully blocked for some reason on a 3 200 mile round trip.

To make up for this the fuel cap uses a small vent to allow air to enter the tank. Your tank has to breathe.