1998 Chevy Astro fuel injection installation

1998 CHEVROLET ASTRO
100,000 MILES • 6 CYL • 2WD • AUTOMATIC
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VORTEC2
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took off upper intake manifold and removed spider injection system. Noticed a shining nipple on the side of the fuel regulator that was not attached to anything in my vehicle. The manual states it goes to a vacuum hose. Where is this hose located and what does it come off and why do I need it?

I am replacing #4 injector and poppet assembly tube. Want to put back together and don't know what to do with this.

Thank you, Dennis
Jun 20, 2010 at 9:01 AM
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