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Vacuum line?

slabelle67

NAXJA Forum User
Location
Fischer, TX
I have a 1989 Cherokee Laredo 4.0. While replacing the valve cover, I broke a plastic vacuum line. It goes from the base of the throttle body up to the firewall. I can see where it plugs in at the other end but I dont know what it is for. It has a three prong electrical connector and bolts to the firewall. Not sure what it is and what problems I may have if it is disconnected.
 
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