i have no vacuum pressure in the cab for selector switch on the climate control panel. therefore the ac only blows out of the defrost vent's onto the windshield. I have found the valve that open's the air duct's for the front vent's but there is no pressure getting to it at all. I also checked vacuum pressure all the way from the intake to this ball??? I have know idea what it is, because the chilton do not give a name of discription of what it does,or is. any help, i would be thankful. sorry it is a 1998 XLT 2.5L 4cyl.
1998 2.5L XLT
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