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Posted on Jan 20, 2011
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Diagram of connection of a G30 1986 van carburetor need vacumn hose connection diagram to reconnect carburetor with a 350 engine and quatro jet carburetor

  • Anonymous Mar 26, 2014

    Diagram of where hoses go on Kai bao carburetor on sky hawk motor

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ZJ Limited

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  • Chevrolet Master 17,989 Answers
  • Posted on Jan 20, 2011
ZJ Limited
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I find this vacuum diagrams for 1986 Chevrolet Truck G30 1 ton Van 5.7L 4BL 8cyl (click over pic for zoom)...

Diagram of connection of a G30 1986 van carburetor - zjlimited_515.jpg

Fig. 136: 1986 5.7L engine-Federal with automatic transmission (G10, 20 and 30 models)



Fig. 137: 1986 5.0L and 5.7L engines-California with automatic transmission (G10, 20 and 30 models)

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Fig. 138: 1986 5.7L engine-Federal with manual transmission (G30 heavy duty models)

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Fig. 139: 1986 5.7L engine-Federal with automatic transmission (G30 heavy duty modDiagram of connection of a G30 1986 van carburetor - zjlimited_519.jpg>

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Fig. 140: 1986 5.7L engine-CaDiagram of connection of a G30 1986 van carburetor - zjlimited_520.jpgual transmission (G30 heavy duty models)

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Fig. 141: 1986 5.7L engine-California with automatic transmission G30 (heavy duty models)


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Check out the images. There is also a link to buy the diagram decal.

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I have no resource to find a diagram. You may need to check a repair manual that your local library might have. Or purchase a Haynes or Chilton manual for around $25. Or join a forum for older Chevy/GMC trucks; somebody there could help you, I'm sure. Good luck.
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if u mean a plastic tube the runs from the bellow on the throttle body to the rear cylinder head , just below the coil pack,,, metal tubes are the gas lines or the injector rails , and bottom of the EGR valve has to metel tube the runs the exhsust manifold,, your under hood decal should have your Vaccum diagram on it.. if thats the breather tube your engine should being running very rich= burning a lot of Gas!!!
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