![]() But I can't confirm that until you tell us more. and my guess is bad radiator cap flow back vent. This gas vapor will bind fuel pumps or fuel lines and create back pressure on the fuel lines preventing liquid fuel from flowing to the engine. My guess, Nissan, you're seeing coolant leakage. Vapor lock occurs when the liquid gasoline flashes into a vapor, blocking the flow of liquid gasoline in the fuel system. Is that because you are leaking coolant all over the place?.Take common, wooden clothes pins (any supermarket should carry them) and clip them to the fuel line at any fuel line location near a heat source (about 1/2' separation between pins). If you suspect this is your problem, heres an old fashioned remedy/trick. Is that because the car is so hot, the Air Conditioning system shuts off (to protect the engine?) Vapor lock is due to bubbles forming in the fuel/fuel line due to excessive heat.When I open the fuel tank, I have to force the gas cap off. I can fill it up and run about 100 miles and the engine dies. It that because the temp gauge is getting too hot, and the overheating/check engine lamp is lit? I am getting a vapor lock on my fuel tank.It would be nice to understand why you are saying your vehicle is "overheating". Hint, when a car has a "vapor lock" problem, it won't start. But all of this has absolutely nothing at all to do with your issue of overheating. you have a pressure valve on the fuel rail,push it in to let the air out of the gas line or your fuel filter could be stoped up.cars today do not vapor lock. Keep the fuel lines as far away from road heat as possible, (summers road surfaces can get HOT) 3. Keep the fuel lines away from exhaust heat. So even 118 race fuel, will not change anything to do with vapor lock. That high pressure prevents the fuel from boiling and causing vapor lock. Basically, vapor lock is sorta like an air bubble that wont move without pressure behind it. That check valve also keeps the fuel pressure in the lines pretty high. There is a check valve in the end of the fuel pump that keeps the fuel from flowing back into the tank after the vehicle is shut off. Modern fuel injection vehicles have a high pressure fuel pump, typically in tank. In a low fuel pressure situation with that heat, the fuel vaporizes in the fuel lines and you won't be able to start your car, until things cool down.Ĭlearly this was a huge issue with carburetor systems (with a vacuum type mechanical fuel pump). the hottest cycle of an engine occurs AFTER the vehicle is shut off. Typically vapor lock is caused by low fuel pressure in combination with excessive heat. And as a gas, you are not going to be able to keep that vehicle running. He's right, a pocket of air in the fuel line will definitely stop flow.īut the term "Vapor Lock" typically involves overheating of fuel in the fuel line to the point where it vaporizes from liquid to gas. ![]() Huh? Not sure I totally agree with Solar Mike here. ![]()
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