Vaccum hose diagrams for a 99 yukon z71 with a 5.7

Hi Roman,here's a Autozone link to your vacuum diagram. Repair Guides Component Locations 3 0l vq30de V6 Engine AutoZone com

This is for a 3.1 liter engine.

See if this is your's. http://ls1tech.com/forums/conversions-hybrids/1236578-under-hood-fuse-panel-diagram.html

google images for your : 2002 ford Econo Van 2.0ltr motor fe vacuum hose diagrams.

Vacum diagrams should be under hood on hood or radiator support alsi in repair books at parts house

CHeck this diagrams...

Fig. 14: Vacuum hose routing-1987 2.9L engine - zoom link here

Fig. 13: Vacuum hose routing-1987 2.3L engines - zoom link here

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check and see if you have a vaccum leak.check the vaccum hose that goes to the fuel pressure regulator.check the vaccum tee that comes off of the intake manifold and goes to the brake booster.hope this helps.

YOU HAVE A VACCUM HOSE OFF CHECK UNDER DASH ON PASSENGER SIDE PEOPLE WILL KICK THE HOSE LISTEN FOR VACCUM LEAK OR CHECK UNDER HOOD

truck normally has a vacuum hose routing diagram on under side of hood on drivers side.also look for metal tag on center of engine compartment fire wall which gives you a motor id @ and trk model # you can then know what engine vacuum diagram you need.i have a diagram for an 86 720 series Z24 carb engine that can be copied off of truck..chris