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Turning on heater causes car to lose rpms and stall

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Old Feb 28, 2009 | 06:12 AM
  #1  
Timothayyy's Avatar
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Joined: Dec 2007
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From: Virginia
Car: 1992 Firebird
Engine: 350TBI
Transmission: 700r4
Axle/Gears: Ford 9in 4.10
Turning on heater causes car to lose rpms and stall

Not really any idea what it is.
Does my heater blower need to be replaced? im confused
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Old Feb 28, 2009 | 08:25 AM
  #2  
305sbc's Avatar
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Posts: 2,428
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From: Fairview Heights Illinois
Car: 1986 Irocz
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: 3.25:1
Re: Turning on heater causes car to lose rpms and stall

I'm thinking faulty vacuum switch behind the heater control, - well unless it's some kind of electrical short, but then there'd be smoke or smell.
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