1991 Volvo 740 not blowing

1991 VOLVO 740
314,000 MILES • 4 CYL • 2WD • AUTOMATIC
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VOLVOLOVER
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  • 1 POST
when car is idle the ac is great, but when i accelerate it dosent some out the vents until i am off the gas.
Aug 22, 2008 at 11:24 AM
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2CARPRO JACK
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  • 11,533 POSTS
check for a leak in the source vacuum line that goes from the hvac control to the engine. Might have a check valve on it that is bad or a small leak in the line
Aug 22, 2008 at 11:50 AM