Jun 232017
 

1997 Buick Lesabre

Do fuel injected cars vapor lock?

After I have been driving my car for a while and I turn the car off, when I go to start my car again it wont start. It’s as if my car is vapor locking (but I didn’t think fuel injection cars can do that or can they?) It’s 114* outside..my temp gauge is normal, I have 3/4 tank of gas, my oil gauge is right below 40. I’m guessing either my fuel pump and or fuel filter.


We have created a wonderful no start diagnostic chart to help assist in such an occasion. You will need to determine what the engine is not getting when it is trying to start. A quick test would be to spray some starting fluid in the air filter to see if it tries to run. If it does, then you know it is fuel related for sure.

Vapor Lock

Yes fuel injected engines can vapor lock. It might not be as common as in the old days but non the less it can and does occur. Vapor lock is just air trapped inside the fuel system. Simply removing the gas cap would releive the situation if this is what is happening.

  One Response to “Do fuel injected cars vapor lock?”

  1. I have a fuel injected car that constantly gets active vapor lock when idling at running temperature.

    2001 Pontiac grand am 3.4l v6
    New fuel pump.
    New fuel filter.
    New fuel pressure regulator.
    Full tank of gas.

    Will sputter and shut off and you can hear fuel pump audibly trying to pass air bubbles and straining.

    Lines were spliced to install new pump, and gasket on pump isn’t sealing properly.

    If you have any info it would be greatly appreciated.

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