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Having trouble with vapor locking - Cars & Trucks

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Vapor lock can be caused by many different things, all coming down to the same root cause: too much heat in the fuel feed lines.

Low fuel pressure can cause the amount of heat needed to vapor lock to be lower than normal, so checking fuel pressure is important. Fuel pump going out feels a lot like vapor lock.

Engine overheat can also cause vapor lock. Clogged fuel filter can cause vapor lock. The fuel line should be routed away from the exhaust system.

Posted on Feb 29, 2016

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Posted on Jan 02, 2017

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1 Answer

Where do find the vapor lock on my 1999 Buick century


Vapor lock occurs when the gas in a fuel line turns from liquid to vapor, before it reaches the engine. The first signs of vapor lock are normally when your engine begins to run roughly. The engine may sputter and hesitate. It will then stall completely and refuse to restart. It may seem like the car is out of gas or the fuel pump has failed. While these are possibilities, vapor lock may be the problem.

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Can vapor lock in the cooling system cause the engine to not spark and through off the camshaft sensor on a scanner in a 2001 dodge dakota sport 4.7 L v8 magnum manual transmission


No.
To begin with, there is no such thing as vapor lock in the cooling system. Vapor lock is when liquid gasoline vaporizes due to excessive heat. If the engine got hot enough to turn coolant into vapor the engine would seize up.
Do you have trouble code numbers ?

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Its possible if you have a carb instead of fuel injection.
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Vapor locks


It could be a vapor lock but not likely. Since the introduction of fuel injection vapor lock has been eliminated.
You need to figure out if you are loosing fuel pressure or spark when it will not start back up. Could be a fuel pump relay or ignition module among other things. Even a problem with the vent for the gas tank.

Jul 27, 2012 | 1990 Ford Econoline

1 Answer

I have codes po441,p0450 on my 1997 lexus es 300 can u help and where are they


P0441 = Evaporative Emission Control System Incorrect Purge Flow.
Trouble Area(s)
Open or short in VSV circuit for VAP.
Open or short in VSV circuit for vapor pressure sensor.
Open or short in vapor pressure sensor.
VSV for EVAP.
VSV for vapor pressure sensor.
Vapor pressure sensor.
Vacuum hose cracks, holed blocked, damaged or disconnected.
Charcoal canister cracked, holed or damaged.
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Open or short in vapor pressure sensor circuit.
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ECM.

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1 Answer

I get vapor lock everyday in my 1992 buick grand margui v8 especially in the simmer here in las vegas. Whar do I do to fix it? What causes it please!


How would you know that you get vapor lock?

We don't live in the 1950 or 1960's any more

Explain what the drivability issues your having are
& what has been done to diagnose it

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I have a 87 mustang and it has a mr gasket electric fuel pump. It vapor locks all the time. i have to take fuel line off turn switch on let fuel pick back up then plug the fuel line back up and it will...


Actually vapor lock refers to a condition in the intake manifold on a carbureted engine. You don't have vapor lock. What you may have is a filter inside the tank, its nicknamed a sock. Its a fine mesh screen and may be plugging up. When you pull the fuel line the fuel flows back and unblocks a small section , until it starts too **** again and re plugs. You may also have fuel pump that starts to lose power when its gets hot. Lee

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2 Answers

Is it vapor locking or not? All else shows okay.


vapor lock just doesn't happen on newer cars that are fuel injected like yours, it was carburetor equipped cars that vapor locked

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