Vapor lock in the fuel system?

來源: beHappyLOL 2010-04-16 08:51:12 [] [舊帖] [給我悄悄話] 本文已被閱讀: 次 (1980 bytes)
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from what I understand vapor lock is caused by the fuel in your fuel lines heating to the point where it boils and creates a vapor before entering the cylinder and when it finally reaches the cylinder you dont have the appropriate amount of fuel and your engine may stall or worse you may get detonation.

Vapor lock is the result of high altitude, high temperatures, or a combination on your car's engine. Vapor lock can occur at any altitude due to heat, but it is more common at higher altitudes, because gas at high altitudes vaporizes at a lower temperature. The resulting gas/air mixture can slow down or even stop the flow of gas to the engine, especially if your car is not designed for high altitude travel.
The key symptoms that your car is suffering from vapor lock is a loss of engine power, a rough running engine, and/or a engine that will not start. To reduce the chance of vapor lock, avoid running the air conditioner, and at the first signs of power loss, shift your car into neutral and rev up the engine. Finally, be sure to shift to low gear when climbing.

If your engine won't start due to vapor lock, here are a few good tips you may want to try to get it started:

* First, loosen the gas cap. Be sure to stand back when doing this because gas may spray out at you.

* Second, remove the air cleaner cover and hold open the choke flutter valve in the carburetor with a object, like a screwdriver. Be careful - backfires can occur.

* Third, start the engine, holding the gas pedal all the way to the floor - do not pump the gas.

* Fourth, wrap a wet cloth or cloth with snow around the metal fuel line near the carburetor (trace fuel line to make certain it goes to the carburetor).

* Finally, let the motor cool at least 30 minutes before trying to start the car.

Try this a few times, but don't over do it or your car battery will die.
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