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Old 02-24-2015, 09:52 PM   #1
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Default Air not blowing from dash vents

I know this has been asked several times, but they never really work for me. I bought my car for $450 which was quite a steal. It'* middle end of winter with some cold weather still and the heat only comes out of the defrost and floor. I am getting vacuum from the engine cause i could disconnect the vacuum tube for HVAC and i got suction. So i could find it somewhere between the T and wherever the vacuum lines connect. Please help ,1990 Oldsmobile Toronado BASE
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Old 02-25-2015, 07:05 AM   #2
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Does the engine idle change when you disconnect the vacuum line to the HVAC? If so, you may have a leak downstream at the head unit. Otherwise, your controller may be the culprit.
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Old 02-25-2015, 09:28 AM   #3
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Quote:
Originally Posted by Mike1995 View Post
Does the engine idle change when you disconnect the vacuum line to the HVAC? If so, you may have a leak downstream at the head unit. Otherwise, your controller may be the culprit.
Idle stays the same, not a difference in rpm
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Old 02-26-2015, 07:10 AM   #4
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Old trick is, Light up a cigarette, and blow into the vac line.....look for smoke emanating where it shouldn't...
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Old 03-01-2015, 06:43 PM   #5
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Try looking @ the vac lines that are going / coming from cruise controll in eng. area!! Trace /follow them to the engine that is where the cruise & heat/ ac controller gets its vacumn from!! Maybe have to look/pull the battery tray due to some lines run under that!!
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