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    vacuum advance

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    scy135
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    vacuum advance

    Post  scy135 on Fri May 22, 2015 12:58 am

    I noticed my 78 caprice 350 has a distributor with vacuum advance but I cant find the hose the goes to it. My question is is my car supposed to have vacuum advance if so where does it hook up to
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    HeavyChevy77
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    Re: vacuum advance

    Post  HeavyChevy77 on Sun May 24, 2015 4:59 pm

    Check the" why is my car hard to start when cold" thread in the questions/problems section I posted a vacuum diagram pic
    Here's the links to how mine are plumbed
    https://i.servimg.com/u/f59/18/98/28/33/image14.jpg
    https://i.servimg.com/u/f59/18/98/28/33/image16.jpg
    https://i.servimg.com/u/f59/18/98/28/33/image17.jpg
    https://i.servimg.com/u/f59/18/98/28/33/image18.jpg
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    scy135
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    Re: vacuum advance

    Post  scy135 on Sun May 24, 2015 7:30 pm

    I looked around my carb and I found a small hose fitting tucked in the back it appears to be the same size so I'm gonna buy some hose. Hopefully that will help my car accelerate
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    Re: vacuum advance

    Post  GM B-Body Forum on Mon May 25, 2015 8:59 am

    is yours completely stock? But yes there is a hose, and if you have the original quadrajet carb theres a small vac port off the front right side if your facing the carb, theres alot of vacuum ports coming off of them, but this one has a check valve, it will be round with 4 vac lines going to it, the front hose on that check valve goes all the way to the vac advance


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    1979 Caprice Sport Coupe, 400hp Vortec 350, Th350, GM 8.5 w/disc brakes, 3.90 gears Detroit Truetrac, 2.5" stainless duals w/ x-pipe, Dynomax race bullets.
    1984 Caprice Sedan, 305 motor, 700r4
    1978 Caprice Sedan, 305 motor, th350
    1993 L99 Caprice, 4.3 v8, 4l60 trans
    1972 Ford F-100, 302 windsor, c4 trans
    2001 BMW E46 330i, 3.0L
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    scy135
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    Re: vacuum advance

    Post  scy135 on Mon May 25, 2015 4:08 pm

    Yea my car is all stock ohh ok I guess someone messed with my vacuum lines prior because they're all taken up except for the one in the back
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    Re: vacuum advance

    Post  HeavyChevy77 on Mon May 25, 2015 4:29 pm

    scy135 wrote:Yea my car is all stock ohh ok I guess someone messed with my vacuum lines prior because they're all taken up except for the one in the back
    That back one is for the air cleaner or should be ..compare ur hose plumbing to mine in the other pics I sent
    Here's a vac diagram for high altitude 77 sbc 350
    https://i.servimg.com/u/f59/18/98/28/33/image10.jpg

      Current date/time is Thu Aug 17, 2017 5:12 pm