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probably you have a disconnected vacuum line. that line runs from the passenger side of the intake to the firewall and across the firewall and through the firwewall in fron of the drivers door by the windshield wiper motor. it then runs under the steerring column and joins some mechanisms above the accelorator pedal. when you find it and join it your car will run better too.

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Q: 87 Subaru GL w vacuum heater controls Mine will not switch from bi-level heat or defrost... how do I get the dash off to fix these controls?
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