Vacuum leaks
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Vacuum leaks

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    Senior Member carreradude's Avatar
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    Default Vacuum leaks

    I was on a Chevy truck website and a guy on there said he uses starting fluid to find vacuum leaks. I know this is a very bad way to do this. What is the best and safest way to hunt a leak? Thanks for any input!

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    Senior Member ol guy's Avatar
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    Quote Originally Posted by carreradude View Post
    I was on a Chevy truck website and a guy on there said he uses starting fluid to find vacuum leaks. I know this is a very bad way to do this. What is the best and safest way to hunt a leak? Thanks for any input!
    Yes, not the safest way. As we know an engine at an idle will pulse ( at a low idle) at that point you can spray with very soapy water, watch the stream and it will vanish and blow bubbles in a cycle. This all depends on where you are looking for a leak and idle RPM. If you are chasing a leak at higher RPM you can use water and listen for a stumble just be careful not to use to much. M

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    I haven't heard of using starting fluid, but I've heard of and used WD-40.
    The motor will speed up when the WD-40 is sucked in at the leak location.

    Starting fluid might damage paint on the engine, I'm not sure.
    It might work.

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    Senior Member shan's Avatar
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    I've always used carb cleaner.
    Quote Originally Posted by Spike Morelli View Post
    Golfers and Fishermen are third rate bullshitters, compared to lots of hot boaters....

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    Senior Member jockorace's Avatar
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    [QUOTE=jimsplace;4296178]I haven't heard of using starting fluid, but I've heard of and used WD-40.
    The motor will speed up when the WD-40 is sucked in at the leak location.

    Starting fluid might damage paint on the engine, I'm not sure.
    It might work.[/QUOTE

    EXACTLY! Used WD-40 many times back in the old days (High School) when I had junkier stuff or just probably didn't put shit together right, lol! Jocko

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    Using starter fluid, will tell you if you have bad wires...BOOM

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